132 cards

Math Flash Cards for 2nd Graders to Flip and Print

Seven second grade skills, one question to a card, each back with a short reason.

8 + 5

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Type the answer: a number, or the word odd or even

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Next step Next: every addition fact to 12 + 12 Next: subtraction flash cards

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Add and subtract to 20 24

6 + 5 11: 6 + 4 makes 10, and 1 more is 11.
7 + 4 11: 7 + 3 makes 10, and 1 more is 11.
7 + 6 13: 7 + 3 makes 10, and 3 more is 13.
7 + 7 14: double 7.
8 + 3 11: 8 + 2 makes 10, and 1 more is 11.
8 + 5 13: 8 + 2 makes 10, and 3 more is 13.
8 + 7 15: 8 + 2 makes 10, and 5 more is 15.
9 + 2 11: 9 + 1 makes 10, and 1 more is 11.
9 + 4 13: 9 + 1 makes 10, and 3 more is 13.
9 + 6 15: 9 + 1 makes 10, and 5 more is 15.
9 + 8 17: 9 + 1 makes 10, and 7 more is 17.
9 + 9 18: double 9.
11 − 2 9: 11 − 1 is 10, then 1 more off is 9.
11 − 4 7: 11 − 1 is 10, then 3 more off is 7.
12 − 5 7: 12 − 2 is 10, then 3 more off is 7.
12 − 7 5: 12 − 2 is 10, then 5 more off is 5.
13 − 6 7: 13 − 3 is 10, then 3 more off is 7.
13 − 8 5: 13 − 3 is 10, then 5 more off is 5.
14 − 5 9: 14 − 4 is 10, then 1 more off is 9.
14 − 9 5: 14 − 4 is 10, then 5 more off is 5.
15 − 7 8: 15 − 5 is 10, then 2 more off is 8.
16 − 8 8: because 8 + 8 = 16, a double.
17 − 9 8: 17 − 7 is 10, then 2 more off is 8.
18 − 9 9: because 9 + 9 = 18, a double.

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Hundreds, tens and ones 18

1 hundred 0 tens 5 ones 105: 100 + 0 + 5 = 105. The 0 holds the tens place.
1 hundred 3 tens 2 ones 132: 100 + 30 + 2 = 132.
2 hundreds 3 tens 4 ones 234: 200 + 30 + 4 = 234.
2 hundreds 5 tens 0 ones 250: 200 + 50 + 0 = 250.
3 hundreds 0 tens 7 ones 307: 300 + 0 + 7 = 307. The 0 holds the tens place.
3 hundreds 7 tens 2 ones 372: 300 + 70 + 2 = 372.
4 hundreds 1 ten 9 ones 419: 400 + 10 + 9 = 419.
4 hundreds 6 tens 1 one 461: 400 + 60 + 1 = 461.
5 hundreds 2 tens 9 ones 529: 500 + 20 + 9 = 529.
5 hundreds 6 tens 6 ones 566: 500 + 60 + 6 = 566.
6 hundreds 0 tens 0 ones 600: 600 + 0 + 0 = 600.
6 hundreds 8 tens 1 one 681: 600 + 80 + 1 = 681.
7 hundreds 2 tens 0 ones 720: 700 + 20 + 0 = 720.
7 hundreds 4 tens 4 ones 744: 700 + 40 + 4 = 744.
8 hundreds 0 tens 3 ones 803: 800 + 0 + 3 = 803. The 0 holds the tens place.
8 hundreds 1 ten 5 ones 815: 800 + 10 + 5 = 815.
9 hundreds 4 tens 8 ones 948: 900 + 40 + 8 = 948.
9 hundreds 9 tens 9 ones 999: 900 + 90 + 9 = 999.

10 or 100 more or less 18

10 less than 203 193: 20 tens take away 1 ten leave 19 tens.
10 less than 381 371: the tens digit goes from 8 to 7; the other digits stay.
10 less than 412 402: the tens digit goes from 1 to 0; the other digits stay.
10 less than 560 550: the tens digit goes from 6 to 5; the other digits stay.
10 less than 700 690: 70 tens take away 1 ten leave 69 tens.
10 more than 108 118: the tens digit goes from 0 to 1; the other digits stay.
10 more than 164 174: the tens digit goes from 6 to 7; the other digits stay.
10 more than 295 305: 29 tens and 1 more ten make 30 tens.
10 more than 347 357: the tens digit goes from 4 to 5; the other digits stay.
10 more than 490 500: 49 tens and 1 more ten make 50 tens.
100 less than 356 256: the hundreds digit goes from 3 to 2; the other digits stay.
100 less than 418 318: the hundreds digit goes from 4 to 3; the other digits stay.
100 less than 672 572: the hundreds digit goes from 6 to 5; the other digits stay.
100 less than 900 800: the hundreds digit goes from 9 to 8; the other digits stay.
100 more than 130 230: the hundreds digit goes from 1 to 2; the other digits stay.
100 more than 249 349: the hundreds digit goes from 2 to 3; the other digits stay.
100 more than 580 680: the hundreds digit goes from 5 to 6; the other digits stay.
100 more than 805 905: the hundreds digit goes from 8 to 9; the other digits stay.

Count by 5s, 10s and 100s 18

5, 10, 15, 20, ? 25: count by 5s. Each number is 5 more than the last.
13, 23, 33, ? 43: count by 10s. Each number is 10 more than the last.
30, 40, 50, ? 60: count by 10s. Each number is 10 more than the last.
35, 40, 45, ? 50: count by 5s. Each number is 5 more than the last.
64, 164, 264, ? 364: count by 100s. Each number is 100 more than the last.
70, 80, 90, ? 100: count by 10s. Each number is 10 more than the last.
85, 90, 95, ? 100: count by 5s. Each number is 5 more than the last.
100, 200, 300, ? 400: count by 100s. Each number is 100 more than the last.
120, 220, 320, ? 420: count by 100s. Each number is 100 more than the last.
135, 140, 145, ? 150: count by 5s. Each number is 5 more than the last.
160, 170, 180, ? 190: count by 10s. Each number is 10 more than the last.
250, 350, 450, ? 550: count by 100s. Each number is 100 more than the last.
270, 275, 280, ? 285: count by 5s. Each number is 5 more than the last.
270, 280, 290, ? 300: count by 10s. Each number is 10 more than the last.
395, 400, 405, ? 410: count by 5s. Each number is 5 more than the last.
500, 600, 700, ? 800: count by 100s. Each number is 100 more than the last.
540, 550, 560, ? 570: count by 10s. Each number is 10 more than the last.
700, 800, 900, ? 1,000: count by 100s. Each number is 100 more than the last.

Odd or even 18

Odd or even? 3 odd: 3 = 1 + 1 + 1, so one is left without a partner.
Odd or even? 4 even: 4 = 2 + 2, two equal groups.
Odd or even? 5 odd: 5 = 2 + 2 + 1, so one is left without a partner.
Odd or even? 6 even: 6 = 3 + 3, two equal groups.
Odd or even? 7 odd: 7 = 3 + 3 + 1, so one is left without a partner.
Odd or even? 8 even: 8 = 4 + 4, two equal groups.
Odd or even? 9 odd: 9 = 4 + 4 + 1, so one is left without a partner.
Odd or even? 10 even: 10 = 5 + 5, two equal groups.
Odd or even? 11 odd: 11 = 5 + 5 + 1, so one is left without a partner.
Odd or even? 12 even: 12 = 6 + 6, two equal groups.
Odd or even? 13 odd: 13 = 6 + 6 + 1, so one is left without a partner.
Odd or even? 14 even: 14 = 7 + 7, two equal groups.
Odd or even? 15 odd: 15 = 7 + 7 + 1, so one is left without a partner.
Odd or even? 16 even: 16 = 8 + 8, two equal groups.
Odd or even? 17 odd: 17 = 8 + 8 + 1, so one is left without a partner.
Odd or even? 18 even: 18 = 9 + 9, two equal groups.
Odd or even? 19 odd: 19 = 9 + 9 + 1, so one is left without a partner.
Odd or even? 20 even: 20 = 10 + 10, two equal groups.

Greater or less 18

Which is greater? 132 or 123 132: the hundreds match, and 3 tens beat 2 tens.
Which is greater? 199 or 201 201: 2 hundreds beat 1 hundred.
Which is greater? 289 or 298 298: the hundreds match, and 9 tens beat 8 tens.
Which is greater? 347 or 374 374: the hundreds match, and 7 tens beat 4 tens.
Which is greater? 450 or 405 450: the hundreds match, and 5 tens beat 0 tens.
Which is greater? 520 or 518 520: the hundreds match, and 2 tens beat 1 ten.
Which is greater? 763 or 736 763: the hundreds match, and 6 tens beat 3 tens.
Which is greater? 808 or 880 880: the hundreds match, and 8 tens beat 0 tens.
Which is greater? 999 or 909 999: the hundreds match, and 9 tens beat 0 tens.
Which is less? 145 or 154 145: the hundreds match, and 4 tens are fewer than 5 tens.
Which is less? 240 or 204 204: the hundreds match, and 0 tens are fewer than 4 tens.
Which is less? 399 or 401 399: 3 hundreds are fewer than 4 hundreds.
Which is less? 506 or 560 506: the hundreds match, and 0 tens are fewer than 6 tens.
Which is less? 512 or 521 512: the hundreds match, and 1 ten is fewer than 2 tens.
Which is less? 615 or 651 615: the hundreds match, and 1 ten is fewer than 5 tens.
Which is less? 660 or 606 606: the hundreds match, and 0 tens are fewer than 6 tens.
Which is less? 703 or 730 703: the hundreds match, and 0 tens are fewer than 3 tens.
Which is less? 871 or 817 817: the hundreds match, and 1 ten is fewer than 7 tens.

Coins 18

1 dime, 3 nickels = ?¢ 25¢: 1 dime is 10¢ and 3 nickels are 15¢.
1 quarter, 1 dime = ?¢ 35¢: 1 quarter is 25¢ and 1 dime is 10¢.
1 quarter, 1 nickel, 1 penny = ?¢ 31¢: 1 quarter is 25¢, 1 nickel is 5¢ and 1 penny is 1¢.
1 quarter, 2 dimes, 1 nickel = ?¢ 50¢: 1 quarter is 25¢, 2 dimes are 20¢ and 1 nickel is 5¢.
1 quarter, 2 nickels = ?¢ 35¢: 1 quarter is 25¢ and 2 nickels are 10¢.
1 quarter, 4 pennies = ?¢ 29¢: 1 quarter is 25¢ and 4 pennies are 4¢.
2 dimes, 1 nickel = ?¢ 25¢: 2 dimes are 20¢ and 1 nickel is 5¢.
2 dimes, 3 pennies = ?¢ 23¢: 2 dimes are 20¢ and 3 pennies are 3¢.
2 quarters = ?¢ 50¢: 2 quarters are 50¢.
2 quarters, 1 dime = ?¢ 60¢: 2 quarters are 50¢ and 1 dime is 10¢.
3 dimes, 2 pennies = ?¢ 32¢: 3 dimes are 30¢ and 2 pennies are 2¢.
3 quarters = ?¢ 75¢: 3 quarters are 75¢.
3 quarters, 2 dimes = ?¢ 95¢: 3 quarters are 75¢ and 2 dimes are 20¢.
4 dimes, 1 nickel = ?¢ 45¢: 4 dimes are 40¢ and 1 nickel is 5¢.
4 nickels = ?¢ 20¢: 4 nickels are 20¢.
4 quarters = ?¢ 100¢: 4 quarters are 100¢. That is one dollar.
5 dimes = ?¢ 50¢: 5 dimes are 50¢.
6 nickels = ?¢ 30¢: 6 nickels are 30¢.

How this list was compiled: Own work. Every answer and every line of working is computed with whole-number arithmetic; the finished deck was then read back and each answer worked out again (checked 2026-09-30). A number is even when it splits into two equal groups: https://en.wikipedia.org/wiki/Parity_%28mathematics%29. A penny is 1 cent, a nickel 5, a dime 10 and a quarter 25: https://en.wikipedia.org/wiki/Coins_of_the_United_States_dollar. The seven sets follow skills the Common Core State Standards for Mathematics list for grade 2 (adding and subtracting within 20, hundreds, tens and ones, 10 or 100 more or less than a number from 100 to 900, counting by 5s, 10s and 100s, odd and even to 20, comparing three-digit numbers, and coins), read in the copy at https://learning.ccsso.org/wp-content/uploads/2022/11/ADA-Compliant-Math-Standards.pdf. The choice of grade is this site's reading, not an alignment. Licence: own work

How it works

Math flash cards for 2nd graders in seven sets: adding and subtracting to 20, hundreds, tens and ones, 10 or 100 more or less, counting by 5s, 10s and 100s, odd or even, greater or less, and coins.

Read the full guide

Start with facts that cross ten

The deck opens on Add and subtract to 20: facts such as 8 + 5 and 14 − 9, where the back shows how to pass through ten. Turn one card, then move on under Show only to place value, counting patterns, odd or even, comparing or coins, or open More options to type the answers.

Print the cards for a math center

Choose one set, turn a card and press the print button under the card. Twelve cards fill a sheet; print on both sides, flipped on the long edge, and each answer lands behind its question: 25 behind 2 dimes and 1 nickel.

On a coin card, count the largest coins first: quarters, then dimes, nickels and pennies.
An even number splits into two equal groups. An odd number leaves one over.

Questions and answers

What math facts should a 2nd grader know?

By the end of grade 2 the Common Core asks a child to know from memory every sum of two one-digit numbers and to add and subtract within 20 with ease. Our reading, not an alignment.

How do you know if a number is odd or even?

Pair it up. If every one has a partner, the number is even: 12 is 6 + 6. If one is left over, it is odd: 13 is 6 + 6 + 1.

How much is a quarter, a dime, a nickel and a penny?

A quarter is 25 cents, a dime is 10, a nickel is 5 and a penny is 1. Together the four coins make 41 cents.

What does the 0 mean in 307?

It holds the tens place. 307 is 3 hundreds, 0 tens and 7 ones; without the zero the number would read 37.