1. K.V. IAT GIRINAGAR, PUNE – 25
Mrs. Pushpa Prakash
Class – IV
Subject – Mathematics
Unit – 6 Addition Subtraction
Topic – Estimating Sums and Difference

2. ESTIMATING SUMS

3. Round The Number To The Nearest 10 And Add 1
Answer : Actual Estimate - 120

4. Round The Number To The Nearest 100 And Add 1
Answer : Actual – Estimate - 300

5. Round The Number To The Nearest 1000 And Add
Answer : Actual – Estimate

6. Exercise Nearest 10 69 42 57 + 78 + 37 + 74 . . . (b) Nearest 100
(b) Nearest 100

7. Exercise
(c) Nearest 1000

8. ESTIMATING DIFFERENCES

9. Estimate the difference to the nearest 10 And Subtract
Solution-
E.g
Ans: Actual-24 Estimate-20

10. Example 2
Ans: Actual Estimate-50

11. Estimate the difference to the nearest 100 And Subtract
Solution-
E.g
Ans: Actual Estimate-4700

12. Estimate the difference to the nearest 1000 And Subtract
Solution-
E.g
Ans:Actual Estimate-1700

13. Exercise Nearest ten 9 1 8 5 6 - 6 8 - 1 3 9 ___ ____
___ ____
(b) Nearest hundred
_____ _____

14. (c) Nearest thousands 4 5 6 5 0 - 2 4 7 5 6 _______