Q51Written answer
[12 × ( – 7)] × 5 = ___ × [(– 7) × ___ ]
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12, 5:
NCERT Exemplar · Class 7 · Maths
Chapter 1: Integers
Practice each question, then open the answer or worked solution.
Questions
83 questionsQ52Written answer
23 × ( – 99) = ___ × ( – 100 + ___ ) = 23 × ___ + 23 × ___
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Worked solution
23, 1, -100, 1:
23 × ( – 99) = 23 × ( – 100 + 1 ) = 23 × (-100) + 23 × 1 (Distributive property of integers)
Q53Written answer
___ × ( – 1) = – 35
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35:
35 × ( – 1) = – 35
Q54Written answer
____ × ( – 1) = 47
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-47:
-47 × ( – 1) = 47 (product of even number of negative integers is a positive integer)
Q55Written answer
88 × ___ = – 88
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-1:
88 × -1 = – 88
Q56Written answer
___ × (–93) = 93
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-1:
-1 × (–93) = 93
Q57Written answer
( – 40) × __ = 80
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-2:
( – 40) × (-2) = 80
Q58Written answer
___ × (–23) = – 920
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40:
40 × (–23) = – 920
Q59Written answer
When we divide a negative integer by a positive integer, we divide them as whole numbers and put a ______ sign before quotient.
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negative
Q60Written answer
When –16 is divided by _________ the quotient is 4.
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Worked solution
-4:
Let -16 be divided by x and the quotient is 4
So, -16/x = 4
x = -4