Page 54 - Maths Skill - 3

52 Maths

Example 2: Estimate the difference of 892 and 720 to the nearest hundreds.

rounded to Estimated difference Actual difference
Solution: 892 nearest hundreds 900 H T O H T O

rounded to 9 0 0 8 9 2
720 nearest hundreds 700 – 7 0 0 – 7 2 0

2 0 0 1 7 2

Exercise 4.8

1. Estimate each difference to the nearest tens. Also, find the actual difference.

(a) 26 – 13 (b) 72 – 21 (c) 592 – 63

2. Estimate each difference to the nearest hundreds. Also, find the actual difference.

(a) 245 – 125 (b) 349 – 119 (c) 2169 – 149

ASSESSMENT TIME

COMPETENCY BASED QUESTIONS

A. Multiple-Choice Questions (Tick (3) the Correct Option)

1. The value of 1173 – 1173 is

(a) 1700 (b) 0 (c) 1720

2. The difference of 5748 and 5 is

(a) 748 (b) 5248 (c) 5743

3. 2618 – 1539 is

(a) 4166 (b) 2163 (c) 1079

4. 4289 – 1325 is

(a) 2964 (b) 2360 (c) 2384

5. What should be added to 179 to get 500?

(a) 321 (b) 326 (c) 313

B. Fill in the Blanks

1. 847 – 847 = ________ 2. 6427 – ________ = 6427