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)  

Find the number of ones when 5 ones are subtracted from 19 tens
19 tens - 5 ones = ___ ones.






(                    )




2)  

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






(                    )




3)  

How many ones will you get after you've subtracted 8 ones from 59 tens

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






(                    )




4)  

Find the number of ones when 8 ones are subtracted from 78 tens
78 tens - 8 ones = ___ ones.






(                    )




5)  

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






(                    )




6)  

How many ones will you get after you've subtracted 2 ones from 74 tens

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






(                    )




7)  

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






(                    )




8)  

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






(                    )




9)  

How many ones will you get after you've subtracted 4 ones from 45 tens

45 ten(s) - 4 one(s) = ___ ones.






(                    )




10)  

Find the number of ones when 7 ones are subtracted from 42 tens
42 tens - 7 ones = ___ ones.






(                    )




 

1)  

Find the number of ones when 5 ones are subtracted from 19 tens
19 tens - 5 ones = ___ ones.





Answer: 4


SOLUTION 1 :

Step 1:  19 tens = 19 x 10

                          = 190

Step 2: 5 ones = 5 x 1

                        = 5

Step 3: 190 - 5 = 185



2)  

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





Answer: 4


SOLUTION 1 :

Step 1: 1 ten = 1 x 10

                     = 10

Step 2: 1 one = 1 x 1

                       = 1

Step 3: 10 - 1 = 9



3)  

How many ones will you get after you've subtracted 8 ones from 59 tens

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





Answer: 2


SOLUTION 1 :

Step 1:  59 tens = 59 x 10

                          = 590

Step 2: 8 ones = 8 x 1

                        = 8

Step 3: 590 - 8 = 582



4)  

Find the number of ones when 8 ones are subtracted from 78 tens
78 tens - 8 ones = ___ ones.





Answer: 2


SOLUTION 1 :

Step 1:  78 tens = 78 x 10

                          = 780

Step 2: 8 ones = 8 x 1

                        = 8

Step 3: 780 - 8 = 772



5)  

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





Answer: 1


SOLUTION 1 :

Step 1: 1 ten = 1 x 10

                     = 10

Step 2: 1 one = 1 x 1

                       = 1

Step 3: 10 - 1 = 9



6)  

How many ones will you get after you've subtracted 2 ones from 74 tens

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





Answer: 3


SOLUTION 1 :

Step 1:  74 tens = 74 x 10

                          = 740

Step 2: 2 ones = 2 x 1

                        = 2

Step 3: 740 - 2 = 738



7)  

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





Answer: 4


SOLUTION 1 :

Step 1:  4 tens = 4 x 10

                          = 40

Step 2: 9 ones = 9 x 1

                        = 9

Step 3: 40 - 9 = 31



8)  

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





Answer: 4


SOLUTION 1 :

Step 1: 1 ten = 1 x 10

                     = 10

Step 2: 1 one = 1 x 1

                       = 1

Step 3: 10 - 1 = 9



9)  

How many ones will you get after you've subtracted 4 ones from 45 tens

45 ten(s) - 4 one(s) = ___ ones.





Answer: 1


SOLUTION 1 :

Step 1:  45 tens = 45 x 10

                          = 450

Step 2: 4 ones = 4 x 1

                        = 4

Step 3: 450 - 4 = 446



10)  

Find the number of ones when 7 ones are subtracted from 42 tens
42 tens - 7 ones = ___ ones.





Answer: 3


SOLUTION 1 :

Step 1:  42 tens = 42 x 10

                          = 420

Step 2: 7 ones = 7 x 1

                        = 7

Step 3: 420 - 7 = 413