Long Multiplication: 100 × 90

Long Multiplication Calculator
Multiplicand (number to be multiplied)
Multiplier (number to multiply by)

What is 100 × 90?

Answer

100 × 90 =
9,000

One partial product: the only non-zero digit of 90 is 9, and it stands for 9 × 10: 100 × 90 = 9,000. 90 × 100 gives the same 9,000.

100 × 90 in a column

100
×90
9000

In the column: product 9,000.

Step by step: 100 × 90

  1. Step 1The last digit of the multiplier is 0, so this partial product is 0 and adds nothing to the total.
  2. Step 2The next digit of the multiplier is 9, and it stands for 90: 100 × 90 = 9,000.
    • 0 × 9 = 0. Write 0.
    • 0 × 9 = 0. Write 0.
    • 1 × 9 = 9. Write 9.
  3. Product9,000

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Recalculate with different values ↑

Products of 100

MultiplicationProduct
100 × 5500
100 × 6600
100 × 7700
100 × 8800
100 × 9900
100 × 101,000
100 × 111,100
100 × 121,200
100 × 151,500
100 × 161,600
100 × 202,000
100 × 252,500
100 × 303,000
100 × 404,000
100 × 505,000
100 × 606,000
100 × 757,500
100 × 808,000
100 × 909,000
100 × 10010,000

FAQ

What is 100 × 90?

100 × 90 = 9,000

Is 100 × 90 the same as 90 × 100?

Yes. Multiplication is commutative, so both come to 9,000. Only the working differs: this page multiplies by 90, which gives a single partial product.

How do you check that 100 × 90 = 9,000?

Divide the product back by one of the factors: 9,000 ÷ 90 = 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 × 90?

Only one of them counts: every other digit of 90 is a zero and contributes nothing, so the work comes down to 100 × 90 = 9,000, with nothing left to add.

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