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.

2500 × 20 = 25 × 2 × _____


Answer:_______________




2)  

Solve the problem below.

4000 × 50 = 40 × 5 × _____


Answer:_______________




3)  

Solve the problem below.

230 × 30 = 23 × 30 × _____


Answer:_______________




4)  

Solve the problem below.

2100 × 30 = 210 × 3 × _____


Answer:_______________




5)  

Solve the problem below.

600 × 30 = 6 × 3 × _____


Answer:_______________




6)  

Solve the problem below.

7700 × 230 = 77 × 23 × _____


Answer:_______________




7)  

Solve the problem below.

240 × 50 = 24 × 50 × _____


Answer:_______________




8)  

Solve the problem below.

400 × 40 = 40 × 4 × _____


Answer:_______________




9)  

Solve the problem below.

1200 × 20 = 12 × 2 × _____


Answer:_______________




10)  

Solve the problem below.

4600 × 190 = 46 × 19 × _____


Answer:_______________




 

1)  

Solve the problem below.

2500 × 20 = 25 × 2 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 2500 x 20 = 50 000
Step 2: 25 x 2 = 50
Step 3: 50 000 ÷ 50 = 1000



2)  

Solve the problem below.

4000 × 50 = 40 × 5 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 4000 x 50 = 200 000
Step 2: 40 x 5 = 200
Step 3: 200 000 ÷ 200 = 1000



3)  

Solve the problem below.

230 × 30 = 23 × 30 × _____

Answer: 10


SOLUTION 1 :

Step 1: 230 x 30 = 6900
Step 2: 23 x 30 = 690
Step 3: 6900 ÷ 690 = 10



4)  

Solve the problem below.

2100 × 30 = 210 × 3 × _____

Answer: 100


SOLUTION 1 :

Step 1: 2100 x 30 = 63000
Step 2: 210 x 3 = 630
Step 3: 63000 ÷ 630 = 100



5)  

Solve the problem below.

600 × 30 = 6 × 3 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 600 x 30 = 18 000
Step 2: 6 x 3 = 18
Step 3: 18 000 ÷ 18 = 1000



6)  

Solve the problem below.

7700 × 230 = 77 × 23 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 7700 x 230 = 1771 000
Step 2: 77 x 23 = 1771
Step 3: 1771 000 ÷ 1771 = 1000



7)  

Solve the problem below.

240 × 50 = 24 × 50 × _____

Answer: 10


SOLUTION 1 :

Step 1: 240 x 50 = 12000
Step 2: 24 x 50 = 1200
Step 3: 12000 ÷ 1200 = 10



8)  

Solve the problem below.

400 × 40 = 40 × 4 × _____

Answer: 100


SOLUTION 1 :

Step 1: 400 x 40 = 16000
Step 2: 40 x 4 = 160
Step 3: 16000 ÷ 160 = 100



9)  

Solve the problem below.

1200 × 20 = 12 × 2 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1200 x 20 = 24 000
Step 2: 12 x 2 = 24
Step 3: 24 000 ÷ 24 = 1000



10)  

Solve the problem below.

4600 × 190 = 46 × 19 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 4600 x 190 = 874 000
Step 2: 46 x 19 = 874
Step 3: 874 000 ÷ 874 = 1000