Number line
Stacking
Tens and ones
100's chart
all
100

20-8=

12

100

81-20=

61

100

74-32=

42

100

35+20=

55

100

45+15=

60

200

44-23=

21

200

55+14=

69

200

45+15=

60

200

71+10=

81

200

26+37=

63

300

40+16=

56

300

23+16=

39

300

74-32=

42

300

78-33=

45

300

67-55=

12

400

50-25=

25

400

42+37=

79

400

53+18=

71

400

88-49=

39

400

54+36=

90

500

54+36=

90

500

63+37=

100
500

91-75=

16

500

67-39

16

500

94-77=

17