Long Multiplication: 45 × 2

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

What is 45 × 2?

Answer

45 × 2 =
90

One partial product: 45 × 2 = 90. 2 × 45 gives the same 90.

45 × 2 in a column

45
×2
90

In the column: product 90.

Step by step: 45 × 2

  1. Step 1Multiply the multiplicand by the last digit of the multiplier, 2: 45 × 2 = 90.
    • 5 × 2 = 10. Write 0 and carry 1.
    • 4 × 2 = 8, plus the carried 1 makes 9. Write 9.
  2. Product90

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Recalculate with different values ↑

Products of 45

MultiplicationProduct
35 × 270
36 × 272
37 × 274
38 × 276
39 × 278
40 × 280
41 × 282
42 × 284
43 × 286
44 × 288
45 × 290
46 × 292
47 × 294
48 × 296
49 × 298
50 × 2100
51 × 2102
52 × 2104
53 × 2106
54 × 2108

FAQ

What is 45 × 2?

45 × 2 = 90

Is 45 × 2 the same as 2 × 45?

Yes. Multiplication is commutative, so both come to 90. Only the working differs: this page multiplies by 2, which gives a single partial product.

How do you check that 45 × 2 = 90?

Divide the product back by one of the factors: 90 ÷ 2 = 45 exactly, with no remainder. Multiplication and division undo each other, which is what makes this check work.

What are the partial products of 45 × 2?

There is only one: the multiplier 2 has a single digit, so 45 × 2 = 90 is written straight under the line, with no addition step.

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