Computation and Number Sense

Exercises
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Table of contents:
  • Count On
  • Understanding Addition
  • Subtraction
  • Exercises on Addition and Subtraction
  • Mind Challenger

Count On

 

count_on

count_on

 

Understanding Addition

 

Additon

addition

 

Subtraction

 

subtraction

subtraction

subtraction

 

 

Addition - Exercise

 
1.Complete the following sums.

 

a) + = ________
b) + = ________
       
c) + = ________
 

2. Copy and complete these. Make each one different.

_______ + __________ = 20

_______ + __________ = 20

_______ + __________ = 20

_______ + __________ = 20

_______ + __________ = 20

_______ + __________ = 20

3. Count on.
 

3) Write the number that is hidden.

a) 5 + = 15

b) + 8 = 16

c) 11 + = 19

d) + 10 = 20

 

 

Subtraction - Exercise

1) Wash away three shells. Write down your answer.

_______ - ________ = _________

 

_______ - ________ = _________

_______ - ________ = _________

 
2) Count Back

MIND CHALLENGER

 

1)Read the story. Complete the related facts.

Ella had 23 pet birds. Fifteen were female and the rest were male.

How many birds were male?

________ - ________ = _________ or ________ + ________ = _________

 

 

2) Imagine you threw 3 darts and they all hits this target.

darts

Add three possible scores in your head.

  • What is the greatest total you can get?
  • What is the least total you can get?
  • Show one way you can make a total of 90.

 

3) There are 4 cubes in each small box.

a) How many cubes are in the big box?

b) Write or draw a picture to show how you figured out the answer.

 

 
4) Look at this number line.

.

What numbers could be located at points A, B, C, D and E?

 

More exercises will be coming soon.

My-Rummy Team

 

 

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