Addition (Mental Maths)

Number strings

100

2 + 5 + 5

20 + 50 + 50

0.2 + 0.5 + 0.5

12

120

1.2

200

7 + 6 + 3

70 + 60 + 30

0.7 + 0.6 + 0.3

16

160

1.6

300

2 + 9 + 8 + 5 + 1

20 + 90 + 80 + 50 + 10

0.2 + 0.9 + 0.8 + 0.5 + 0.1

25

250

2.5

400

6 + 6 + 10

60 + 60 + 100

0.6 + 0.6 + 1

22

220 

2.2

500

0.7 + 0.4 + 0.3 =

1.4

Near Multiples

100

20 + 39

59

200

46 + 39

85

300

78 + 59

137

400

81 + 46

127

500

198 + 57

255

Basic facts

100

8 + 2

80 + 20

0.8 + 0.2

10

100

1

200

7 + 7

70 + 70

0.7 + 0.7

14

140

1.4

300

10 + 8

100 + 80

1 + 0.8

18

180

1.8

400

7 + 8

70 + 80

0.7 + 0.8

15

150

1.5

500

80 + 80

0.8 + 0.8

160

1.6

Partition

100

23 + 41

64

200

35 + 72

107

300

43 + 66

109

400

154 + 42

196

500

234 + 146

380

Bonds to 100/10/1

100

5 + __ = 10

50 + __ = 100

0.5 + __ = 1

5

50

0.5

200

3 + __ = 10

35 + __ = 100

0.35 + ___ = 1

7

65

0.65

300

2 + ___ = 10

72 + ___ = 100

0.72 + ____ = 1

8

28

0.28

400

13 + __ = 20

134 + __ = 200

1.34 + ___ = 2

7

66

0.66

500

6 + __ = 20

33 + __ = 200

0.33 + ____ = 2

14

167

1.67