Page 66 - Start Up Mathematics_3

4. Multiply and write the product.

(a) 19 × 11 (b) 83 × 11 (c) 47 × 11 (d) 90 × 11

(e) 23 × 11 (f) 74 × 11 (g) 55 × 11 (h) 96 × 11

Multiplication of 3-Digit Number by 1-Digit Number

Without carrying over

Example 2: Find the product of 213 and 3.

H T O
Solution: 2 1 3 Step 1: Multiply the digit at the ones place by 3.

3 ones × 3 = 9 ones
× 3
9

H T O
2 1 3 Step 2: Multiply the digit at the tens place by 3.

1 ten × 3 = 3 tens
× 3

3 9

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2 1 3 Step 3: Multiply the digit at the hundreds place
by 3.
× 3
2 hundreds × 3 = 6 hundreds
6 3 9

So, 213 × 3 = 639.

With carrying over

Example 3: Find the product of 432 and 5.

H T O
Solution: 4 3 2 Step 1: Multiply the digit at the ones place by 5.

× 5 2 ones × 5 = 10 ones

1
0

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