Show:
Adding by 10s
Adding by 100s
Subtracting by 10s
Subtracting by 100s
Math Challenge
100

32 + 10 = 

42


100

101 + 100 = 

201

100

70 - 10 = 

60

100

900 - 100 = 

800

100

75 + 12 = 

87

200

43 + 10 = 

53


200

341 + 100 = 

441

200

92 - 10 = 

82

200

775 - 100 = 

675

200

65 - 23 = 

42

300

27 + 20 = 

47


300

727 + 100 = 

827

300

54 - 10 = 

44

300

341- 100 = 

241

300

72 + 26 =

98

400

18 + 30 = 

48

400

345 + 200 = 

545

400

67 - 20 = 

47

400

927 - 200 = 

727

400

95 - 31 = 

64

500

32 + 50 = 

82

500

487 + 400 = 

887

500

88 - 40 = 

48

500

657 - 400 = 

257

500

49 + 41 =  

100