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.

1900 × 50 = 19 × 5 × _____


Answer:_______________




2)  

Solve the problem below.

90 × 30 = 9 × 30 × _____


Answer:_______________




3)  

Solve the problem below.

1600 × 20 = 160 × 2 × _____


Answer:_______________




4)  

Solve the problem below.

6300 × 160 = 63 × 16 × _____


Answer:_______________




5)  

Solve the problem below.

600 × 20 = 6 × 2 × _____


Answer:_______________




6)  

Solve the problem below.

80 × 20 = 8 × 20 × _____


Answer:_______________




7)  

Solve the problem below.

1700 × 20 = 170 × 2 × _____


Answer:_______________




8)  

Solve the problem below.

9600 × 90 = 96 × 9 × _____


Answer:_______________




9)  

Solve the problem below.

400 × 40 = 4 × 4 × _____


Answer:_______________




10)  

Solve the problem below.

210 × 50 = 21 × 50 × _____


Answer:_______________




 

1)  

Solve the problem below.

1900 × 50 = 19 × 5 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 1900 x 50 = 95 000
Step 2: 19 x 5 = 95
Step 3: 95 000 ÷ 95 = 1000



2)  

Solve the problem below.

90 × 30 = 9 × 30 × _____

Answer: 10


SOLUTION 1 :

Step 1: 90 x 30 = 2700
Step 2: 9 x 30 = 270
Step 3: 2700 ÷ 270 = 10



3)  

Solve the problem below.

1600 × 20 = 160 × 2 × _____

Answer: 100


SOLUTION 1 :

Step 1: 1600 x 20 = 32000
Step 2: 160 x 2 = 320
Step 3: 32000 ÷ 320 = 100



4)  

Solve the problem below.

6300 × 160 = 63 × 16 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 6300 x 160 = 1008 000
Step 2: 63 x 16 = 1008
Step 3: 1008 000 ÷ 1008 = 1000



5)  

Solve the problem below.

600 × 20 = 6 × 2 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 600 x 20 = 12 000
Step 2: 6 x 2 = 12
Step 3: 12 000 ÷ 12 = 1000



6)  

Solve the problem below.

80 × 20 = 8 × 20 × _____

Answer: 10


SOLUTION 1 :

Step 1: 80 x 20 = 1600
Step 2: 8 x 20 = 160
Step 3: 1600 ÷ 160 = 10



7)  

Solve the problem below.

1700 × 20 = 170 × 2 × _____

Answer: 100


SOLUTION 1 :

Step 1: 1700 x 20 = 34000
Step 2: 170 x 2 = 340
Step 3: 34000 ÷ 340 = 100



8)  

Solve the problem below.

9600 × 90 = 96 × 9 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 9600 x 90 = 864 000
Step 2: 96 x 9 = 864
Step 3: 864 000 ÷ 864 = 1000



9)  

Solve the problem below.

400 × 40 = 4 × 4 × _____

Answer: 1000


SOLUTION 1 :

Step 1: 400 x 40 = 16 000
Step 2: 4 x 4 = 16
Step 3: 16 000 ÷ 16 = 1000



10)  

Solve the problem below.

210 × 50 = 21 × 50 × _____

Answer: 10


SOLUTION 1 :

Step 1: 210 x 50 = 10500
Step 2: 21 x 50 = 1050
Step 3: 10500 ÷ 1050 = 10