Exercise: 1-B
Q1: Divide
i. 117 ÷ 9 = 13
ii. (-117) ÷ 9 = -13
iii. 117 ÷ (-9) = -13
iv. (-117) ÷ (-9) = 13
v. 225 ÷ (-15) = -15
vi. (-552) ÷ 24 = -23
vii. (-798) ÷ (-21) = 38
viii. (-910) ÷ 26 = -35
Q2: Evaluate
i. (-234) ÷ 13 = -18
ii. 234 ÷ (-13) = -18
iii. (-234) ÷ (-13) = 18
iv. 374 ÷ (-17) = -22
v. (-374) ÷ 17 = -22
vi. (-374) ÷ (-17) = 22
vii. (-728) ÷ 14 = -52
viii. 272 ÷ (-17) = -16
Q3: Find the quotient in each of the following divisions:
i. 299 ÷ 23 = 13
ii. 299 ÷ (-23) = -13
iii. (-384) ÷ 16 = -24
iv. (-572) ÷ (-22) = 26
v. 408 ÷ (-17) = -24
Q4: Divide
i. 204 ÷ 17 = 12
ii. 152 ÷ (-19) = -8
iii. 0 ÷ 35 = 0
iv. 0 ÷ (-82) = 0
v. 5490 ÷ 10 = 549
vi. 762800 ÷ 100 = 7628
Q5: State, true or false :
i. 0 ÷ 32 = 0 → True
ii. 0 ÷ (-9) = 0 → True
iii. (-37) ÷ 0 = 0 → False
iv. 0 ÷ 0 = 0 → False
Q6: Evaluate
i. 42 ÷ 7 + 4
= 6 + 4 = 10
ii. 12 + 18 ÷ 3
= 12 + 6 = 18
iii. 19 – 20 ÷ 4
= 19 – 5 = 14
iv. 16 – 5 × 3 + 4
= 16 – 15 + 4 = 5
v. 6 – 8 – (-6) ÷ 2
= 6 – 8 + 3 = 1
vi. 13 – 12 ÷ 4 × 2
= 13 – 3 × 2 = 13 – 6 = 7
vii. 16 + 8 ÷ 4 – 2 × 3
= 16 + 2 – 6 = 12
viii. 16 ÷ 8 + 4 – 2 × 3
= 2 + 4 – 6 = 0
ix. 16 – 8 + 4 ÷ 2 × 3
= 8 + 2 × 3 = 8 + 6 = 14
x. (-4) + (-12) ÷ (-6)
= -4 + 2 = -2
xi. (-18) + 6 ÷ 3 + 5
= -18 + 2 + 5 = -11
xii. (-20) × (-1) + 14 ÷ 7
= 20 + 2 = 22
Q7: The product of two integers is -90. If one of them is 6, find the other integer.
Product = -90, one number = 6
⇒ other number = -90 ÷ 6 = -15
Q8: The product of two integers is 210. If one of them is -15, find the other.
Product = 210, one number = -15
⇒ other number = 210 ÷ (-15) = -14
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