7 x 100 = 700
7 times 100 is 700. Multiplying by 100 moves every digit two places left, so the 7 simply picks up two zeros. Below: the working, a calculator, and the nearby answers.
7 × 100 = 700
Adding 7 to itself 100 times gives the same answer.
How 7 x 100 makes 700
Multiplying a whole number by 100 shifts every digit two places to the left, which on paper looks like writing two zeros after it. The 7 becomes 700. There is no carrying to track and no need to set out long multiplication.
Read the other way round it is repeated addition. Seven hundreds: 100 + 100 + 100 + 100 + 100 + 100 + 100 = 700.
Where 700 turns up
Seven is the length of a week, so this is the sum behind any daily rate carried across seven days. At 100 a day you hit 700 on the seventh day, whether that is 100 steps, 100 words, 100 pages or 100 dollars. Turning a daily figure into a weekly one is this calculation and nothing more.
The direction that is not tidy
Dividing is where 7 stops being friendly. Both 700 divided by 7 = 100 and 700 divided by 100 = 7 come out exact. But 100 divided by 7 = 14.285714…, a decimal that repeats forever. Multiplying by 7 is clean, dividing 100 by 7 is not, and people often expect the two to behave the same.
Keep the zeros straight
- 7 x 10 = 70
- 7 x 100 = 700
- 7 x 1000 = 7000
Each extra zero in the second number adds one zero to the answer. The next steps in this run are 6 x 100 = 600 and 8 x 100 = 800, and every pair on the site is listed on the multiplication answers hub.