Page 113 - Start Up Mathematics_1

• If we multiply a number ending with zero by another number ending with

zero, we follow the given steps. Let’s multiply 20 by 30.

Step 1: Multiply the numbers by ignoring the zeros.

2 × 3 = 6

Step 2: Count the total number of zeros in both the numbers and write
them to the right of the result obtained in step 1.

So, 20 × 30 = 600.

13 Find the product.

(a) 50 × 30 = (b) 240 × 2 =

(c) 7 × 50 = (d) 110 × 5 =

(e) 220 × 4 = (f) 13 × 10 =

H T O H T O H T O
(g) 4 5 (h) 2 4 (i) 1 9

× 2 0 × 3 0 × 4 0

H T O H T O H T O
(j) 3 5 (k) 6 0 (l) 1 9

× 2 0 × 1 0 × 5 0

H T O H T O H T O
(m) 1 9 (n) 3 2 (o) 3 8

× 4 0 × 3 0 × 2 0

105