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Multiplying by Hundreds other than 100
Let us see how to multiply a number by 200, 300, 400, ..., 900.
a. 1 × 200 = 200 b. 12 × 300 = 3600 c. 14 × 700 = 9800

To multiply a number by 200, 300, 400, ..., 900, first multiply the numbers without
the zeros. Then, write two zeros (00) to the right of the product obtained.

Exercise 4E

1. Multiply the following by expanding the bigger number.

a. 36 × 4 = _____ b. 56 × 9 = _____ c. 64 × 8 = _____
d. 82 × 6 = _____ e. 96 × 9 = _____ f. 89 × 5 = _____

2. fill in the blanks.
a. 11 × ____ = 11 b. ____ × 1 = 28 c. 15 × 6 = ____ × 15
d. 25 × ____ = 39 × 25 e. ____ × 48 = 48 × 77 f. 27 × 0 = ____

g. ____ × 29 = 0 h. 175 × ____ = 0 i. 345 × 0 = ____
3. find the product.
a. 5 × 10 = _____ b. 8 × 10 = _____ c. 10 × 16 = _____
d. 10 × 50 = _____ e. 20 × 6 = _____ f. 12 × 30 = _____

g. 124 × 10 = _____ h. 80 × 4 = _____ i. 90 × 35 = _____
4. Multiply.

a. 2 × 100 = _____ b. 200 × 19 = _____ c. 31 × 300 = _____
d. 17 × 100 = _____ e. 600 × 8 = _____ f. 20 × 700 = _____
g. 500 × 16 = _____ h. 9 × 800 = _____ i. 900 × 9 = _____

5. fill in the blanks.
a. 5 × 20 = _____ b. 8 × _____ = 320 c. _____ × 20 = 120

d. _____ × 60 = 480 e. 11 × 60 = _____ f. _____ × 10 = 1000
g. 6 × 100 = _____ h. 7 × _____ = 3500 i. _____ × 3 = 2100
6. find the product.
a. 5 6 b. 4 2 3 c. 7 8 d. 2 4 9
× 1 × 1 × 0 × 0

7. Answer the following:
a. Ramesh has 83 ten-rupees notes. How much money does he have?
b. There are 256 apples in one box. How many apples are there in 20 such boxes?
c. There are 10 pens in one packet. How many pens are there in the carton which
contains 148 packets?

82 Mathematics 3