7th Grade > Mathematics
INTEGERS MCQs
Total Questions : 115
| Page 4 of 12 pages
:
If 'a' and 'b' are any two integers, then by associative property;
a+(b+c) = (a+b)+c
Answer: Option B. -> (8, -2)
:
B
−2(2)=−1≠−4
8(−2)=−4
−4(2)=−2≠−4
4(1)=4≠−4
∴ (8, -2) is the required pair.
:
B
−2(2)=−1≠−4
8(−2)=−4
−4(2)=−2≠−4
4(1)=4≠−4
∴ (8, -2) is the required pair.
:
The additive inverse of a number 'x' is thenumber that,which when added to 'x' results in zero.
-55 + 55 = 0. Therefore,additive inverse of -55 is 55.
:
Let x be the integer to be found.
x×(−13)= -143
x =−143−13 = 11
:
If 'a' and 'b' are any two integers, by distributive property of multiplication over addition,
a × (b + c) = (a × b) + (a × c)
:
RHS = (-4 × 2) + 10 = 2
LHS = (6 - 7) × -2 = 2
∴(-4 × 2) + 10 = (6 - 7) × -2
:
When even number of negative integers aremultiplied,the product will be a positive integer.
(-1) x (-1) x (-1) x (-1) x ... 80 times
= (-1 ... 80 times)[1x 1x 1 x 1x ... 80 times]
= (+) (1x 1x 1 x 1x ... 80 times)
=1x 1x 1 x 1x ... 80 times
= 1
Answer: Option C. -> −10
:
C
The predecessor of a number is found by subtracting 1 from it.
Therefore,predecessor of −9 is given as,
−9−1=−10
:
C
The predecessor of a number is found by subtracting 1 from it.
Therefore,predecessor of −9 is given as,
−9−1=−10
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