Grade 4 - Progress in Mathematics

Add mentally. Use addition strategies.

17. 1 18. 3 19. 2 20. 4 21. 3 22. 5
    237576
    
    9
    8
    8
    4
    7
    5


18. 1 24. 4 25. 5 26. 3 27. 6 28. 1
    427328
    830341
    
    2
    2
    3
    3
    2
    7


19. 10
    5 30. 9
    5 31. 6
    5 32. 6
    7


20. 8
    10 34. 8
    9 35. 9
    9 36. 8
    8


21. 3
    10 38. 3
    4 39. 9
    3 40. 4
    9


22. Tara has 6 letters and 5 42. Kim has 4 Canadian stamps,
    postcards to mail. Then 5 English stamps, and
    she loses 3 of the 6 French stamps in his
    postcards. How many collection. How many stamps
    stamps does Tara need? does he have altogether?

Find the first sum. Predict the second sum and explain your reasoning.

43. 42
    42 44. 16
    16 45. 35
    35 46. 48
    48

42 
 41 17 
 16 45 
 35 48 
 38

47. 50
    50 48. 20
    20 49. 26
    26 50. 21
    21

50 
 65 20 
 25 27 
 27 25 
 25

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