Scroll:Whole Numbers >> Estimate sums and differences of whole numbers >> mcq (94)


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)  

How many ones will you get after you've subtracted 2 ones from 5 tens

5 ten(s) - 2 one(s) = ___ ones.






(                    )




2)  

Find the number of ones when 9 ones are subtracted from 72 tens
72 tens - 9 ones = ___ ones.






(                    )




3)  

Find the number of ones when 1 one are subtracted from 1 ten
1 ten - 1 one = ___ ones.






(                    )




4)  

How many ones will you get after you've subtracted 8 ones from 80 tens

80 ten(s) - 8 one(s) = ___ ones.






(                    )




5)  

Find the number of ones when 4 ones are subtracted from 9 tens
9 tens - 4 ones = ___ ones.






(                    )




6)  

Find the number of ones when 1 one are subtracted from 1 ten
1 ten - 1 one = ___ ones.






(                    )




7)  

How many ones will you get after you've subtracted 2 ones from 87 tens

87 ten(s) - 2 one(s) = ___ ones.






(                    )




8)  

Find the number of ones when 9 ones are subtracted from 78 tens
78 tens - 9 ones = ___ ones.






(                    )




9)  

Find the number of ones when 1 one are subtracted from 1 ten
1 ten - 1 one = ___ ones.






(                    )




10)  

How many ones will you get after you've subtracted 7 ones from 28 tens

28 ten(s) - 7 one(s) = ___ ones.






(                    )




 

1)  

How many ones will you get after you've subtracted 2 ones from 5 tens

5 ten(s) - 2 one(s) = ___ ones.





Answer: 3


SOLUTION 1 :

Step 1:  5 tens = 5 x 10

                          = 50

Step 2: 2 ones = 2 x 1

                        = 2

Step 3: 50 - 2 = 48



2)  

Find the number of ones when 9 ones are subtracted from 72 tens
72 tens - 9 ones = ___ ones.





Answer: 2


SOLUTION 1 :

Step 1:  72 tens = 72 x 10

                          = 720

Step 2: 9 ones = 9 x 1

                        = 9

Step 3: 720 - 9 = 711



3)  

Find the number of ones when 1 one are subtracted from 1 ten
1 ten - 1 one = ___ ones.





Answer: 2


SOLUTION 1 :

Step 1: 1 ten = 1 x 10

                     = 10

Step 2: 1 one = 1 x 1

                       = 1

Step 3: 10 - 1 = 9



4)  

How many ones will you get after you've subtracted 8 ones from 80 tens

80 ten(s) - 8 one(s) = ___ ones.





Answer: 1


SOLUTION 1 :

Step 1:  80 tens = 80 x 10

                          = 800

Step 2: 8 ones = 8 x 1

                        = 8

Step 3: 800 - 8 = 792



5)  

Find the number of ones when 4 ones are subtracted from 9 tens
9 tens - 4 ones = ___ ones.





Answer: 2


SOLUTION 1 :

Step 1:  9 tens = 9 x 10

                          = 90

Step 2: 4 ones = 4 x 1

                        = 4

Step 3: 90 - 4 = 86



6)  

Find the number of ones when 1 one are subtracted from 1 ten
1 ten - 1 one = ___ ones.





Answer: 3


SOLUTION 1 :

Step 1: 1 ten = 1 x 10

                     = 10

Step 2: 1 one = 1 x 1

                       = 1

Step 3: 10 - 1 = 9



7)  

How many ones will you get after you've subtracted 2 ones from 87 tens

87 ten(s) - 2 one(s) = ___ ones.





Answer: 3


SOLUTION 1 :

Step 1:  87 tens = 87 x 10

                          = 870

Step 2: 2 ones = 2 x 1

                        = 2

Step 3: 870 - 2 = 868



8)  

Find the number of ones when 9 ones are subtracted from 78 tens
78 tens - 9 ones = ___ ones.





Answer: 4


SOLUTION 1 :

Step 1:  78 tens = 78 x 10

                          = 780

Step 2: 9 ones = 9 x 1

                        = 9

Step 3: 780 - 9 = 771



9)  

Find the number of ones when 1 one are subtracted from 1 ten
1 ten - 1 one = ___ ones.





Answer: 2


SOLUTION 1 :

Step 1: 1 ten = 1 x 10

                     = 10

Step 2: 1 one = 1 x 1

                       = 1

Step 3: 10 - 1 = 9



10)  

How many ones will you get after you've subtracted 7 ones from 28 tens

28 ten(s) - 7 one(s) = ___ ones.





Answer: 4


SOLUTION 1 :

Step 1:  28 tens = 28 x 10

                          = 280

Step 2: 7 ones = 7 x 1

                        = 7

Step 3: 280 - 7 = 273