Question

Exercise 1 F
1. Estimate first then write the sum or difference. Find the sum to check your work
(1) 51 - 47
v) 43278 + 2902
D) 9001 - 557
@) 528 +62
(vi) 7893 – 4184
(x) 65662-4465
C) 2314 - 372
(va) 47348 - 2267
(iv) 1521 - 6325
(v) 2597 - 390​

Answer 1

Answer:

1 )51 -47 =4

2 )43278+2902= 46180

3 )8443

4 )590

5 )3719

6 )61207

7) 1932

8.)45081

9 )2207

Answer 2

Answer :

1= 51=50

47=50

50-50=0

2= 43278=43000

2902=3000

43000+3000=46000

3=9001=9000

557=600

9000-600=8400

4=528=500

62=60

500+60=560

.........Sorry i am busy