Page 54 - Fun with Mathematics 2

4
MULTIPLICATION BY 100, 200, 300, 00 AND SO ON
To multiply any number by 100, just place two zeros on the right hand
l
side of the number.

5 × 100 = 500 13 × 100 = 1300
78 × 100 = 7800 99 × 100 = 9900

4
To multiply any number by 200, 300, 00 or so on, first multiply the
l
number by the digit at the hundreds place, and then, just place two zeros
on the right hand side of the product.
4
Multiply by 200. Multiply 15 by 500.

4 × 2 0 0 = 8 0 0 1 5 × 5 0 0 = 7 5 0 0

4 × 2 = 8 with two zeros 15 × 5 = 75 with two zeros
on the right hand side on the right hand side

is the answer is the answer

12 Find the product.

(a) 3 × 100 = (b) 6 × 100 =

(c) 33 × 100 = (d) 4 8 × 100 =

(e) 60 × 100 = (f) 90 × 100 =

4
(g) 2 × 300 = (h) 8 × 00 =

(i) 10 × 200 = (j) 13 × 500 =

(k) 12 × 4 00 = (l) 13 × 300 =

(m) 27 × 200 = (n) 28 × 300 =

(o) 12 × 600 = (p) 11 × 900 =

4
(q) 1 × 200 = (r) 15 × 200 =

54