SChand New Learning Composite Mathematics Class 7 Chapter 1 Integers Exercise 1E

Exercise 1E

Question 1

Verify and name the property used.

(a) 18×(-15)=(-15)×18

(b) 15×[3×(-12)]=(15×3)×-12

(c) 20×[75+(-15)]=20×75+20×(-15)

(d) -12×[(-7)+5]=(-12)×(-7)+(-12)×5

Sol :

Question 2

Fill in the blanks :

(a) 28×__=28

(b) -16×__=16

(c) 285×__=0

(d) 0÷63=__

(e) -95÷__=-1

(f) -50×__=50

Question 3

Evaluate by using suitable properties:

(a) 37×(-58)+(-58)×(-27)

(b) -45×(103)

(c) 4×87×(-25)

(d) 19×(-25)×(-4)×(-8)

(e) (-16)×(-39)

(f) (-68)×(-19)+68