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.

2200 × 250 = 22 × 25 × _____


Answer:_______________




2)  

Solve the problem below.

1200 × 20 = 120 × 2 × _____


Answer:_______________




3)  

Solve the problem below.

70 × 20 = 7 × 20 × _____


Answer:_______________




4)  

Solve the problem below.

700 × 30 = 7 × 3 × _____


Answer:_______________




5)  

Solve the problem below.

1800 × 80 = 18 × 8 × _____


Answer:_______________




6)  

Solve the problem below.

2100 × 20 = 210 × 2 × _____


Answer:_______________




7)  

Solve the problem below.

60 × 40 = 6 × 40 × _____


Answer:_______________




8)  

Solve the problem below.

1500 × 20 = 15 × 2 × _____


Answer:_______________




9)  

Solve the problem below.

2800 × 130 = 28 × 13 × _____


Answer:_______________




10)  

Solve the problem below.

2100 × 50 = 210 × 5 × _____


Answer:_______________




 

1)  

Solve the problem below.

2200 × 250 = 22 × 25 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 2200 x 250 = 550 000
Step 2: 22 x 25 = 550
Step 3: 550 000 ÷ 550 = 1000



2)  

Solve the problem below.

1200 × 20 = 120 × 2 × _____

Answer: 100


SOLUTION 1 :

Step 1: 1200 x 20 = 24000
Step 2: 120 x 2 = 240
Step 3: 24000 ÷ 240 = 100



3)  

Solve the problem below.

70 × 20 = 7 × 20 × _____

Answer: 10


SOLUTION 1 :

Step 1: 70 x 20 = 1400
Step 2: 7 x 20 = 140
Step 3: 1400 ÷ 140 = 10



4)  

Solve the problem below.

700 × 30 = 7 × 3 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 700 x 30 = 21 000
Step 2: 7 x 3 = 21
Step 3: 21 000 ÷ 21 = 1000



5)  

Solve the problem below.

1800 × 80 = 18 × 8 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1800 x 80 = 144 000
Step 2: 18 x 8 = 144
Step 3: 144 000 ÷ 144 = 1000



6)  

Solve the problem below.

2100 × 20 = 210 × 2 × _____

Answer: 100


SOLUTION 1 :

Step 1: 2100 x 20 = 42000
Step 2: 210 x 2 = 420
Step 3: 42000 ÷ 420 = 100



7)  

Solve the problem below.

60 × 40 = 6 × 40 × _____

Answer: 10


SOLUTION 1 :

Step 1: 60 x 40 = 2400
Step 2: 6 x 40 = 240
Step 3: 2400 ÷ 240 = 10



8)  

Solve the problem below.

1500 × 20 = 15 × 2 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1500 x 20 = 30 000
Step 2: 15 x 2 = 30
Step 3: 30 000 ÷ 30 = 1000



9)  

Solve the problem below.

2800 × 130 = 28 × 13 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 2800 x 130 = 364 000
Step 2: 28 x 13 = 364
Step 3: 364 000 ÷ 364 = 1000



10)  

Solve the problem below.

2100 × 50 = 210 × 5 × _____

Answer: 100


SOLUTION 1 :

Step 1: 2100 x 50 = 105000
Step 2: 210 x 5 = 1050
Step 3: 105000 ÷ 1050 = 100