Basic Mathematical Operations: MCQ test, Set 2

$7 - 4 =$
A $11$ B $4$ C $3$ D $2$

Answer and solution

Answer: (C) $3$

Count back $4$ from $7$ .

$7 - 4 = 3$
$7 + \square = 8$ . The number in the box is
A $1$ B $8$ C $15$ D $2$

Answer and solution

Answer: (A) $1$

$\square = 8 - 7 = 1$

Check: $7 + 1 = 8$
On the number line, start at $60$ and jump back $4$ steps. You land on
A $56$ B $55$ C $57$ D $64$

Answer and solution

Answer: (A) $56$

Jumping back $4$ steps from $60$ means $60 - 4$ .

$60 = 50 + 10$ and $10 - 4 = 6$ , so $60 - 4 = 50 + 6 = 56$
$55 - 3 =$
A $25$ B $52$ C $58$ D $51$

Answer and solution

Answer: (B) $52$

Take $3$ from the units digit: $5 - 3 = 2$ ; the tens digit $5$ stays.

$55 - 3 = 52$
$59 - 7 =$
A $53$ B $51$ C $66$ D $52$

Answer and solution

Answer: (D) $52$

Take $7$ from the units digit: $9 - 7 = 2$ ; the tens digit $5$ stays.

$59 - 7 = 52$
By the 2nd method, $73 - 8 = \square - 10$ . The number in the box is
A $65$ B $71$ C $75$ D $81$

Answer and solution

Answer: (C) $75$

2nd method: add $2$ to both: $73 - 8 = 75 - 10 = 65$

So the box is $75$
$52 - 9 =$
A $61$ B $43$ C $57$ D $53$

Answer and solution

Answer: (B) $43$

1st method: take $2$ out of $9$ first ( $9 - 2 = 7$ ): $52 - 9 = 50 - 7 = 43$
$77 - 30 =$
A $57$ B $74$ C $107$ D $47$

Answer and solution

Answer: (D) $47$

Take $3$ tens from $7$ tens: $7 - 3 = 4$ ; the units digit $7$ stays.

$77 - 30 = 47$
By the 2nd method, $94 - 56 = \square - 60$ . The number in the box is
A $98$ B $90$ C $38$ D $100$

Answer and solution

Answer: (A) $98$

Add $4$ to both numbers so that $56$ becomes $60$ .

$94 - 56 = 98 - 60$ , so the box is $98$
$48 - 27 =$
A $31$ B $22$ C $75$ D $21$

Answer and solution

Answer: (D) $21$

units $8 - 7 = 1$ , tens $4 - 2 = 2$ : $48 - 27 = 21$
$440 - 7 =$
A $433$ B $434$ C $443$ D $447$

Answer and solution

Answer: (A) $433$

$440 = 430 + 10$ and $10 - 7 = 3$ , so $440 - 7 = 430 + 3 = 433$
$350 - 18 =$
A $342$ B $332$ C $368$ D $348$

Answer and solution

Answer: (B) $332$

2nd method: add $2$ to both: $350 - 18 = 352 - 20 = 332$
$100 - 36 = \square - 6$ . The number in the box is
A $60$ B $80$ C $70$ D $64$

Answer and solution

Answer: (C) $70$

Take away the tens first: $100 - 30 = 70$

So $100 - 36 = 70 - 6$ ; the box is $70$
$100 - 40 =$
A $60$ B $140$ C $70$ D $50$

Answer and solution

Answer: (A) $60$

$10$ tens $-$ $4$ tens $=$ $6$ tens

$100 - 40 = 60$
$160 - 80 =$
A $80$ B $180$ C $120$ D $240$

Answer and solution

Answer: (A) $80$

Take $60$ from both: $160 - 80 = 100 - 20$

$100 - 20 = 80$
$115 - 28 =$
A $97$ B $87$ C $113$ D $187$

Answer and solution

Answer: (B) $87$

3rd method: $115 - 100 = 15$ and $100 - 28 = 72$

$115 - 28 = 15 + 72 = 87$
$50 + 72 =$
A $122$ B $77$ C $112$ D $132$

Answer and solution

Answer: (A) $122$

Add the tens: $50 + 70 = 120$ ; the units digit $2$ stays.

$50 + 72 = 122$
$90 + 10 =$
A $110$ B $90$ C $10$ D $100$

Answer and solution

Answer: (D) $100$

$9$ tens $+$ $1$ ten $=$ $10$ tens

$90 + 10 = 100$
$84 + 75 =$
A $169$ B $149$ C $59$ D $159$

Answer and solution

Answer: (D) $159$

Tens: $80 + 70 = 150$

Units: $4 + 5 = 9$

$84 + 75 = 150 + 9 = 159$
In $1512 \div 2$ , the first step is $15 \div 2$ . The remainder after this step is
A $5$ B $7$ C $1$ D $3$

Answer and solution

Answer: (C) $1$

$2 \times 7 = 14$ is the biggest number in the $2$ table that is not more than $15$ .

$15 - 14 = 1$
$1152 \div 4 =$
A $278$ B $288$ C $289$ D $2088$

Answer and solution

Answer: (B) $288$

Long division with the $4$ table gives $288$ .

Check: $4 \times 288 = 1152$
$532690 \div 5 =$
A $16538$ B $106539$ C $1006538$ D $106538$

Answer and solution

Answer: (D) $106538$

Divide digit by digit with the $5$ table: $532690 \div 5 = 106538$

Check: $5 \times 106538 = 532690$
$30435 \div 5 =$
A $687$ B $6870$ C $6087$ D $60087$

Answer and solution

Answer: (C) $6087$

When a brought-down number is less than $5$ , a $0$ goes in the quotient.

$30435 \div 5 = 6087$ (check: $5 \times 6087 = 30435$ )
$3652 \div 11 =$
A $331$ B $332$ C $333$ D $3032$

Answer and solution

Answer: (B) $332$

Long division with the $11$ table gives $332$ .

Check: $11 \times 332 = 3652$
$\displaystyle \frac{40}{5} =$
A $200$ B $35$ C $8$ D $9$

Answer and solution

Answer: (C) $8$

$\displaystyle \frac{40}{5}$ means $40 \div 5$ .

$5 \times 8 = 40$ , so $\displaystyle \frac{40}{5} = 8$

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MCQ test, Set 2