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Question (1)

QN0033058

Which mental strategy is used to solve 1248 ÷ 6 in the textbook?

(A) Repeated doubling
(B) Splitting the dividend into convenient parts
(C) Multiplying by the divisor first
(D) Guess and check

Correct Answer: B

Explanation:

1248 is split into 1200 + 48 and each part is divided separately.

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Question (2)

QN0033059

In the mental strategy for 1992 ÷ 4, 1992 is written as

(A) 1900 + 92
(B) 2000 − 8
(C) 1000 + 992
(D) 1800 + 192

Correct Answer: B

Explanation:

1992 is written as 2000 − 8 to make the calculation easier.

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Question (3)

QN0033060

Which strategy is most suitable for dividing a number by 4 mentally?

(A) Double twice
(B) Halve twice
(C) Add 4 repeatedly
(D) Multiply by 4

Correct Answer: B

Explanation:

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Question (4)

QN0033061

What is the first step in mentally finding 128 ÷ 4 using repeated halving?

(A) Half of 128 is 64
(B) Half of 128 is 32
(C) Double 128
(D) Divide 128 by 8

Correct Answer: A

Explanation:

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Question (5)

QN0033062

1248 ÷ 6 = _____

(A) 206
(B) 207
(C) 208
(D) 210

Correct Answer: C

Explanation:

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Question (6)

QN0033063

Using the strategy 1200 + 48, what is 48 ÷ 6?

(A) 6
(B) 7
(C) 8
(D) 9

Correct Answer: C

Explanation:

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Question (7)

QN0033064

1992 ÷ 4 = _____

(A) 496
(B) 497
(C) 498
(D) 499

Correct Answer: C

Explanation:

2000 ÷ 4 = 500 and 8 ÷ 4 = 2, so 500 − 2 = 498.

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Question (8)

QN0033065

Half of 64 is

(A) 16
(B) 24
(C) 32
(D) 34

Correct Answer: C

Explanation:

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Question (9)

QN0033066

Using repeated halving, 128 ÷ 4 = _____

(A) 30
(B) 31
(C) 32
(D) 34

Correct Answer: C

Explanation:

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Question (10)

QN0033067

Which division can be solved efficiently by halving twice?

(A) 144 ÷ 4
(B) 144 ÷ 9
(C) 144 ÷ 7
(D) 144 ÷ 5

Correct Answer: A

Explanation:

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