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24 questions · self-marked practice — reveal the answer and mark yourself.

Question 12 Marks
Using brackets write three pairs of numbers whose : division is 16
Answer
32 ÷ 2 = 16,
48 ÷ 3 = 16,
64 ÷ 4 = 16,
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Question 22 Marks
Using brackets write three pairs of numbers whose : multiplication is 16 and
Answer
4 x 4 = 16,
8 x 2 = 16,
16 x 1 = 16
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Question 32 Marks
Using brackets write three pairs of numbers whose : difference is 9
Answer
12 – 3 = 9,
11 – 2 = 9,
10 – 1 = 9
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Question 52 Marks
Write the following properties in words : n ÷ 1 = n
Answer
Dividing any number by 1, gives the number itself.
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Question 62 Marks
Write the following properties in words: m – 0 = m
Answer
Subtracting zero from any number, gives the number itself.
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Question 82 Marks
Write the followîng properties in words: a x 1 = a
Answer
The product of any number and 1 is the number itself.
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Question 92 Marks
Use a letter for any number and write the following properties in short : Dividing non zero number by itself gives us 1.
Answer
a ÷ a = 1
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Question 102 Marks
Use a letter for any number and write the following properties in short : The difference of any two different numbers and the difference obtained after changing the order of those numbers is not same.
Answer
a – b ≠ b – a
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Question 112 Marks
Use a letter for any number and write the following properties in short : Dividing zero by any non zero number is zero.
Answer
0 + a = 0
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Question 122 Marks
Use a letter for any number and write the following properties in short.: The division of any two different numbers and the divisions obtained after changing the order of those numbers is not the same.
Answer
a ÷ b ≠ b + a
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Question 132 Marks
Use a letter for any number and write the following properties in short.: The product of any number and 1 is the number itself.
Answer
a x 1 = a
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Question 142 Marks
Use a letter for any number and write the following properties in short.: The product of any number and zero is zero.
Answer
a x 0 = 0
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Question 152 Marks
Use a letter for any number and write the following properties in short.: The product of any two numbers and the product obtained after changing the order of those numbers is the same.
Answer
a x b = b x a
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Question 162 Marks
Use a letter for any number and write the following properties in short.: The sum of any number and zero is the number itself.
Answer
a + 0 = a
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Question 192 Marks
Fill the Blanks : (0 + 1) > (5 × [ ] )
Answer
0 + 1 = 1,
5 x 1 = 5
5 x 0 = 0
1 < 5 and 1 > 0 so, (0 + 1) > (5 x Q)
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Question 202 Marks
Fill the Blanks : (48 ÷ 3) < ( [ ] × 5)
Answer
48 – 3 = 16,
5 x 4 = 20
5 x 3 = 15
16 > 15 and 16 < 20 so, (48 + 3) <(4 x 5)
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Question 212 Marks
Fill the Blanks : (5 × 4) > (7 × [ ] )
Answer
5 x 4 = 20, 7 x ………… must be less than 20.
7 x 2 = 14
so, (5 x 4) > ( 7 x 2)
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Question 232 Marks
Find four pairs of numbers, one for each of addition, subtraction, multiplication and division that make the number 18. Write the equalities for each of them.
Answer
(9 + 9), (20 – 2), (9 x 2), (36 ÷ 2).
since 9 + 9
= 18, 20 – 2
= 18, 9 x 2
= 18 and 36 + 2
= 18, so (9 + 9)
= (20 – 2)
= (9 x 2)
= (36 ÷ 2).
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Question 242 Marks
Using brackets, write three pairs of numbers whose sum is 13. Use them to write three equalities.
Answer
(7 + 6), (8 + 5), (9 + 4). since 7 + 6
= 13,8 + 5
= 13, 9 + 4
= 13.

(7 + 6)
= (8 + 5), (7 + 6)
= (9 + 4) or (8 + 5)
= (9 + 4).

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