Multiplication and Division of Integers Class 7 Maths Chapter 2 Practice Set 9 Solutions Maharashtra Board

Multiplication and Division of Integers Class 7 Maths Chapter 2 Practice Set 9 Solutions Maharashtra Board

Std 7 Maths Practice Set 9 Solutions Answers

Question 1.
Solve
i. (-96) ÷ 16
ii. 98 ÷ (-28)
iii. (-51) ÷ 68
iv. 38 ÷ (-57)
v. (-85) ÷ 20
vi. (-150) ÷ (-25)
vii. 100 ÷ 60
viii. 9 ÷ (-54)
ix. 78 ÷ 65
x. (-5) ÷ (-315)
Solution:
i. (-96) ÷ 16

ii. 98 ÷ (-28)

iii. (-51) ÷ 68

iv. 38 ÷ (-57)

v. (-85) ÷ 20

vi. (-150) ÷ (-25)

vii. 100 ÷ 60

viii. 9 ÷ (-54)

ix. 78 ÷ 65

x. (-5) ÷ (-315)

Question 2.
Write three divisions of integers such that the fractional form of each will be 245.
Solution:

1. 245=24×15×1=245=24÷5
2. 245=24×25×2=4810=48÷10
3. 245=24×(−10)5×(−10)=−240−50=(−240)÷(−50)

Question 3.
Write three divisions of integers such that the fractional form of each will be −57.
Solution:

1. −57=−5×27×2=−1014=(−10)÷14
2. −57=−5×(−5)7×(−5)=25−35=25÷(−35)
3. −57=−5×77×7=−3549=(−35)÷49

Question 4.
The fish in the pond below, carry some numbers. (Choose any 4 pairs and carry out four multiplications with those numbers. Now, choose four other pairs and carry out divisions with these numbers.
Examples:
i. (-13) × (-15) = 195
ii. (-24) ÷ 9 = −249=−83

Solution:

1. (-13) × 9 = -117
2. 12 × 13 = 156
3. 9 × (-37) = -333
4. (-15) × (-8) = 120
5. (−28)÷12=−2812=(−1)×(28)12=−73
6. 12÷9=129=43
7. 9÷(−24)=9−24=9(−1)×24=−38
8. (−18)÷(−27)=−18−27=(−1)×18(−1)×27=23

Note: Problems 2, 3 and 4 have many answers. Students may write answers other than the ones given.