Long Multiplication: 100 × 7

"Long Multiplication Calculator" Calculator

Multiplicand (number to be multiplied)

Multiplier (number to multiply by)

What is 100 × 7?

Answer

100 × 7 = 700

100 × 7 and 7 × 100 are the same product — the order of the factors never changes the answer, only the working. Below, 100 is multiplied by 7 in a column, digit by digit.

100 × 7 in a Column

The multiplicand goes on top, the multiplier underneath, both aligned on the right. The multiplier has a single digit, so there is one partial product and the answer goes straight under the line.

 100
×  7
 700
100 × 7 = 700

Step-by-Step Solution

Step 1: Multiply the multiplicand by the last digit of the multiplier, 7: 100 × 7 = 700.

  • 0 × 7 = 0. Write 0.
  • 0 × 7 = 0. Write 0.
  • 1 × 7 = 7. Write 7.

100 × 7

=

700

Check It, and What It Is Not

Check by dividing back. Multiplication and division undo each other, so 700 ÷ 7 = 100 must come out exactly, with no remainder.

Fractions are a different calculation. Both factors here are whole numbers; for 2/3 or 2 3/4 use the fraction multiplication calculator, which multiplies numerators and denominators separately.

100 × 7 is a number, not an area. If those are the sides of a room in feet, the answer is 700 square feet — the same arithmetic, a different question, and it is answered by the square footage calculator.

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About "Long Multiplication Calculator" Calculator

This calculator multiplies two whole numbers the way it is done on paper: digit by digit, carrying where the column overflows, then adding the partial products together. For example, it can help you find out what is 100 × 7? (The answer is: 700). Enter the multiplicand (e.g. '100') and the multiplier (e.g. '7') and hit the button. The order of the two numbers does not matter — 100 × 7 and 7 × 100 are the same product — so either number can go on top. Fractions and mixed numbers belong to the fraction multiplication calculator, and the reverse operation is long division.

"Long Multiplication Calculator" Calculator

Multiplicand (number to be multiplied)

Multiplier (number to multiply by)

Products of 100

MultiplicationProduct
90 × 7630
91 × 7637
92 × 7644
93 × 7651
94 × 7658
95 × 7665
96 × 7672
97 × 7679
98 × 7686
99 × 7693
100 × 7700
110 × 7770
120 × 7840
130 × 7910
140 × 7980
150 × 71,050
160 × 71,120
170 × 71,190
180 × 71,260
190 × 71,330

FAQ

What is 100 × 7?

100 × 7 = 700

Is 100 × 7 the same as 7 × 100?

Yes. Multiplication is commutative, so both come to 700. Only the working differs: this page multiplies by 7, which gives a single partial product.

How do you check that 100 × 7 = 700?

Divide the product back by one of the factors: 700 ÷ 7 = 100 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 100 × 7?

There is only one: the multiplier 7 has a single digit, so 100 × 7 = 700 is written straight under the line, with no addition step.

See Also