Ten more
Ten less
Add 2 digits
Subtracting
say the number
100

50

60

100

48

38

100

25+10

35

100

35-5

30

100

436

Four hundred thirty six

200

75

85

200

78

68

200

60+8

68

200

50-30

20

200

215

Two hundred fifteen 

300

95

105

300

99

89

300

15+45

60

300

43-12

31

300

302

Three hundred two

400

368

468

400

175

165

400

79+15

94

400

78-16

62

400

972

Nine hundred seventy two

500

525

535

500

299

289

500

85+20

105

500
99-49

50

500

898

Eight hundred ninety eight