How it works
This multiplication chart 1-30 runs from 1 × 1 to 30 × 30 = 900. The 30 row and column are tinted, and that row counts time in half hours. Press New practice chart to hide 400 answers, then type them in and press Check.
Read the full guide
What a 30x30 multiplication chart holds
A multiplication chart that goes up to 30 has 900 squares and 308 different answers. The most common, 60 and 120, fill 10 squares each, and no other answer gets past 8.
The last row of a multiplication chart 1 to 30
Each answer in the tinted row is a 3 row answer with a 0 on the end: 3 × 8 = 24, so 30 × 8 = 240. Read the row as minutes and 30 × 4 = 120 is 2 hours, while 30 × 24 = 720 is the 12 hours the hour hand takes to go around. On a 30 x 30 multiplication chart the row above is close by: 29 × 8 is 8 less, 232.
- Halve one number and double the other to land in the tinted row: 15 × 28 is the same as 30 × 14, which is 420.
- Square numbers run down the diagonal from 1 to 900. Seventeen of them, such as 17 × 17 = 289, appear nowhere else on the chart.
Questions and answers
Is a multiplication chart 30x30 the same as this one?
Yes. A multiplication chart 30 x 30 and a multiplication chart that goes to 30 are other names for it. Each means rows and columns numbered 1 to 30, ending at 30 × 30 = 900 in the bottom right corner.
What is a 30s multiplication chart?
The 30 times table by itself: 30, 60, 90 and on to 900, also called a multiplication chart of 30. Here it is the tinted row, and its 30 facts are listed further down. Tap any 360 to light every 360.
Why do 60 and 120 show up so often on a multiplication chart up to 30?
Each has 5 pairs of factors that fit on the chart. For 60 they are 2 × 30, 3 × 20, 4 × 15, 5 × 12 and 6 × 10. Every pair fills 2 squares, one on each side of the diagonal, which makes 10.
How many facts does a multiplication chart to 30 add?
Count a fact and its turnaround once and the 1-30 multiplication chart holds 465 facts. A 12 by 12 chart covers 78 of them, which leaves 387 new ones, most of them 2-digit by 2-digit.