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.

220 × 40 = 22 × 40 × _____


Answer:_______________




2)  

Solve the problem below.

1300 × 20 = 13 × 2 × _____


Answer:_______________




3)  

Solve the problem below.

5700 × 60 = 57 × 6 × _____


Answer:_______________




4)  

Solve the problem below.

1900 × 40 = 190 × 4 × _____


Answer:_______________




5)  

Solve the problem below.

60 × 30 = 6 × 30 × _____


Answer:_______________




6)  

Solve the problem below.

1900 × 20 = 19 × 2 × _____


Answer:_______________




7)  

Solve the problem below.

5800 × 230 = 58 × 23 × _____


Answer:_______________




8)  

Solve the problem below.

2100 × 20 = 210 × 2 × _____


Answer:_______________




9)  

Solve the problem below.

20 × 50 = 2 × 50 × _____


Answer:_______________




10)  

Solve the problem below.

2100 × 50 = 21 × 5 × _____


Answer:_______________




 

1)  

Solve the problem below.

220 × 40 = 22 × 40 × _____

Answer: 10


SOLUTION 1 :

Step 1: 220 x 40 = 8800
Step 2: 22 x 40 = 880
Step 3: 8800 ÷ 880 = 10



2)  

Solve the problem below.

1300 × 20 = 13 × 2 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1300 x 20 = 26 000
Step 2: 13 x 2 = 26
Step 3: 26 000 ÷ 26 = 1000



3)  

Solve the problem below.

5700 × 60 = 57 × 6 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 5700 x 60 = 342 000
Step 2: 57 x 6 = 342
Step 3: 342 000 ÷ 342 = 1000



4)  

Solve the problem below.

1900 × 40 = 190 × 4 × _____

Answer: 100


SOLUTION 1 :

Step 1: 1900 x 40 = 76000
Step 2: 190 x 4 = 760
Step 3: 76000 ÷ 760 = 100



5)  

Solve the problem below.

60 × 30 = 6 × 30 × _____

Answer: 10


SOLUTION 1 :

Step 1: 60 x 30 = 1800
Step 2: 6 x 30 = 180
Step 3: 1800 ÷ 180 = 10



6)  

Solve the problem below.

1900 × 20 = 19 × 2 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1900 x 20 = 38 000
Step 2: 19 x 2 = 38
Step 3: 38 000 ÷ 38 = 1000



7)  

Solve the problem below.

5800 × 230 = 58 × 23 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 5800 x 230 = 1334 000
Step 2: 58 x 23 = 1334
Step 3: 1334 000 ÷ 1334 = 1000



8)  

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



9)  

Solve the problem below.

20 × 50 = 2 × 50 × _____

Answer: 10


SOLUTION 1 :

Step 1: 20 x 50 = 1000
Step 2: 2 x 50 = 100
Step 3: 1000 ÷ 100 = 10



10)  

Solve the problem below.

2100 × 50 = 21 × 5 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 2100 x 50 = 105 000
Step 2: 21 x 5 = 105
Step 3: 105 000 ÷ 105 = 1000