Section 4

Multiplying two digit numbers with 99

Let us try 23 x 99

Take the number 23

Subtract 1 from 23 and write down the answer : 22

Take the number 22

Subtract each of these digits from 9

9 - 2 = 7
9 - 2 = 7


Answer: 23 x 99 = 2277

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Let us try 38 x 99

Take the number 38

Subtract 1 from 37 and write down the answer : 37

Take the number 37

Subtract each of these digits from 9

9 - 3 = 6

9 - 7 = 2

Answer: 38 x 99 = 3762