Page 46 - Maths Class 04

Example : Estimate the product of 347 and 258.

Solution :
Rounding numbers to Rounding numbers to
the nearest 10. the nearest 100.

347 3 5 0 347 3 0 0

258 × 2 6 0 258 × 3 0 0

9 1 0 0 0 9 0 0 0 0

Actual Product

3 4 7
The estimated
× 2 5 8
product is close to
2 7 7 6 the actual product.

1 7 3 5 0

+ 6 9 4 0 0

8 9 5 2 6

Carry On

Estimate the product.

1. 45 × 58 = __________ 2. 64 × 42 = __________

3. 57 × 26 = __________ 4. 83 × 27 = __________

Practice - 3.6
Practice - 3.6
Practice - 3.6
Practice - 3.6
1. Estimate the product by rounding off to the nearest 10.

a. 44 × 31 b. 79 × 46 c. 82 × 25

d. 48 × 36 e. 88 × 32 f. 56 × 35

g. 63 × 38 h. 86 × 23 i. 96 × 17

2. Estimate the product by rounding off to the nearest 100.

a. 408 × 245 b. 664 × 126 c. 821 × 185

d. 543 × 359 e. 715 × 218 f. 624 × 392

g. 478 × 333 h. 425 × 275 i. 592 × 248

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