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Felicia Goh asked in Math

Textbook "Shaping Maths AB 1B Part I - Solutions" consists of the chapter "Addition and Subtraction Within 100" having question no. 1 at page no. 49 - Explain/Solve.

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Global Expert answered this

a)

 

10 − 4 =   6  

20 + 6 =  26 
 

30 − 4 =  26 

b)

 

 10  − 6 = 4

15 + 4 =  19 
 

25 − 6 =  19 

c)

 

 10  − 3 = 7

42 + 7 =  49 
 

52 − 3 =  49 

d)

 

 10  − 6 = 4

33 + 4 =  37 
 

43 − 6 =  37