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.

100 × 40 = 10 × 40 × _____


Answer:_______________




2)  

Solve the problem below.

4100 × 130 = 41 × 13 × _____


Answer:_______________




3)  

Solve the problem below.

1000 × 30 = 10 × 3 × _____


Answer:_______________




4)  

Solve the problem below.

2300 × 50 = 230 × 5 × _____


Answer:_______________




5)  

Solve the problem below.

110 × 30 = 11 × 30 × _____


Answer:_______________




6)  

Solve the problem below.

9800 × 60 = 98 × 6 × _____


Answer:_______________




7)  

Solve the problem below.

2500 × 40 = 25 × 4 × _____


Answer:_______________




8)  

Solve the problem below.

2500 × 20 = 250 × 2 × _____


Answer:_______________




9)  

Solve the problem below.

180 × 40 = 18 × 40 × _____


Answer:_______________




10)  

Solve the problem below.

4500 × 240 = 45 × 24 × _____


Answer:_______________




 

1)  

Solve the problem below.

100 × 40 = 10 × 40 × _____

Answer: 10


SOLUTION 1 :

Step 1: 100 x 40 = 4000
Step 2: 10 x 40 = 400
Step 3: 4000 ÷ 400 = 10



2)  

Solve the problem below.

4100 × 130 = 41 × 13 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 4100 x 130 = 533 000
Step 2: 41 x 13 = 533
Step 3: 533 000 ÷ 533 = 1000



3)  

Solve the problem below.

1000 × 30 = 10 × 3 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1000 x 30 = 30 000
Step 2: 10 x 3 = 30
Step 3: 30 000 ÷ 30 = 1000



4)  

Solve the problem below.

2300 × 50 = 230 × 5 × _____

Answer: 100


SOLUTION 1 :

Step 1: 2300 x 50 = 115000
Step 2: 230 x 5 = 1150
Step 3: 115000 ÷ 1150 = 100



5)  

Solve the problem below.

110 × 30 = 11 × 30 × _____

Answer: 10


SOLUTION 1 :

Step 1: 110 x 30 = 3300
Step 2: 11 x 30 = 330
Step 3: 3300 ÷ 330 = 10



6)  

Solve the problem below.

9800 × 60 = 98 × 6 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 9800 x 60 = 588 000
Step 2: 98 x 6 = 588
Step 3: 588 000 ÷ 588 = 1000



7)  

Solve the problem below.

2500 × 40 = 25 × 4 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 2500 x 40 = 100 000
Step 2: 25 x 4 = 100
Step 3: 100 000 ÷ 100 = 1000



8)  

Solve the problem below.

2500 × 20 = 250 × 2 × _____

Answer: 100


SOLUTION 1 :

Step 1: 2500 x 20 = 50000
Step 2: 250 x 2 = 500
Step 3: 50000 ÷ 500 = 100



9)  

Solve the problem below.

180 × 40 = 18 × 40 × _____

Answer: 10


SOLUTION 1 :

Step 1: 180 x 40 = 7200
Step 2: 18 x 40 = 720
Step 3: 7200 ÷ 720 = 10



10)  

Solve the problem below.

4500 × 240 = 45 × 24 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 4500 x 240 = 1080 000
Step 2: 45 x 24 = 1080
Step 3: 1080 000 ÷ 1080 = 1000