Scroll:Mental Sums >> Mental Sums >> saq (503)

Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.


 

1)  

Solve the problem below.

2100 × 30 = 21 × 3 × _____


Answer:_______________




2)  

Solve the problem below.

5600 × 190 = 56 × 19 × _____


Answer:_______________




3)  

Solve the problem below.

2000 × 40 = 200 × 4 × _____


Answer:_______________




4)  

Solve the problem below.

80 × 40 = 8 × 40 × _____


Answer:_______________




5)  

Solve the problem below.

1800 × 20 = 18 × 2 × _____


Answer:_______________




6)  

Solve the problem below.

8800 × 170 = 88 × 17 × _____


Answer:_______________




7)  

Solve the problem below.

1400 × 40 = 140 × 4 × _____


Answer:_______________




8)  

Solve the problem below.

10 × 50 = 1 × 50 × _____


Answer:_______________




9)  

Solve the problem below.

1600 × 50 = 16 × 5 × _____


Answer:_______________




10)  

Solve the problem below.

8000 × 160 = 80 × 16 × _____


Answer:_______________




 

1)  

Solve the problem below.

2100 × 30 = 21 × 3 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 2100 x 30 = 63 000
Step 2: 21 x 3 = 63
Step 3: 63 000 ÷ 63 = 1000



2)  

Solve the problem below.

5600 × 190 = 56 × 19 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 5600 x 190 = 1064 000
Step 2: 56 x 19 = 1064
Step 3: 1064 000 ÷ 1064 = 1000



3)  

Solve the problem below.

2000 × 40 = 200 × 4 × _____

Answer: 100


SOLUTION 1 :

Step 1: 2000 x 40 = 80000
Step 2: 200 x 4 = 800
Step 3: 80000 ÷ 800 = 100



4)  

Solve the problem below.

80 × 40 = 8 × 40 × _____

Answer: 10


SOLUTION 1 :

Step 1: 80 x 40 = 3200
Step 2: 8 x 40 = 320
Step 3: 3200 ÷ 320 = 10



5)  

Solve the problem below.

1800 × 20 = 18 × 2 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1800 x 20 = 36 000
Step 2: 18 x 2 = 36
Step 3: 36 000 ÷ 36 = 1000



6)  

Solve the problem below.

8800 × 170 = 88 × 17 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 8800 x 170 = 1496 000
Step 2: 88 x 17 = 1496
Step 3: 1496 000 ÷ 1496 = 1000



7)  

Solve the problem below.

1400 × 40 = 140 × 4 × _____

Answer: 100


SOLUTION 1 :

Step 1: 1400 x 40 = 56000
Step 2: 140 x 4 = 560
Step 3: 56000 ÷ 560 = 100



8)  

Solve the problem below.

10 × 50 = 1 × 50 × _____

Answer: 10


SOLUTION 1 :

Step 1: 10 x 50 = 500
Step 2: 1 x 50 = 50
Step 3: 500 ÷ 50 = 10



9)  

Solve the problem below.

1600 × 50 = 16 × 5 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1600 x 50 = 80 000
Step 2: 16 x 5 = 80
Step 3: 80 000 ÷ 80 = 1000



10)  

Solve the problem below.

8000 × 160 = 80 × 16 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 8000 x 160 = 1280 000
Step 2: 80 x 16 = 1280
Step 3: 1280 000 ÷ 1280 = 1000