Grade 4 - Progress in Mathematics

Add or subtract mentally. Think of tens or hundreds.

1. 40
   50 2. 60  10 3. 80  80 4. 50
   70


2. 690  80 6. 250
   20 7. 160
   30 8. 5700  200

Add mentally. Use compensation.

Add mentally. Break apart numbers.

Add mentally.

527


 71

411


 88

343


 75

249


 51

136


 83

155


 74

39


 42

87


 11

72


 25

48


 36

53


 24

64


 27

597


 224

349


 194

395


 277

293


 18

288


 99

196


 78

59


 34

76


 57

38


 23

89


 31

47


 19

98


 62

Round each number to the place of the underlined digit.

33. 50 34. 76 35. 20 36. 70 37. 20 38. 10
    87 40 53 30 80 97
    
    50
    60
    80
    62
    28
    90


34. 6789 40. $62.43 41. $25.20 42. 35 ,032 43. 4 1,863


35. 213 ,609 45. $332.09 46. 5 47,028 47. $680.34

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