Mathematics (+/-)

Addition of Large Numbers

100

15000 + 13000

28000

200

33450 + 27820

61270

300

48523 + 50788

99311

400

17230 + 19450 + 25792

62472

500

18290 + ______ = 47358

29068

Subtraction of Large Numbers

100

17000 - 14000

3000

200

42540 - 23480

19060

300

68723 - 37852

30871

400

94572 - 15650 - 48723

30199

500

87254 - ______ = 32876

54378

Addition of Decimal Numbers

100

1.7 + 0.2

1.9

200

2.6 + 2.6

5.2

300

18.93 + 25.42

44.35

400

47.62 + 94.23 + 68.53

210.38

500

37.54 + _____ = 105.71

68.17

Subtraction of Decimal Numbers

100

2.4 - 0.2

2.2

200

6.8 - 4.9

1.9

300

15.62 - 12.35

3.27

400

305.27 - 47.83 - 78.51

178.93

500

256.37 - ____ = 26.91

229.46

Estimation

100

Round to tens 15 + 21

40

200

Round to hundreds 459 + 730

1200

300

Round to hundreds 1678 - 1497

200

400

Round to ones 4.76 - 3.32

2

500

Round to tenths 18.96 + 48.78

67.80