Mathematics

doubling 1

100

double 70 is

140

200

double 65 is

130

300

double 48 is

96

400

double 115 is

230

500

double 325 is

650

doubling 2

100

Double 70 is

140

200

Double 26 is

52

300

Double 54 is

108

400

Double 96 is

192

500

Double 435 is

870

halving 1

100

half of 18 is

9

200

half of 48 is

24

300

half of 262 is

131

400

half of 720 is

360

500

half of 940 is

470

halving 2

100

Half of 26 is

13

200

Half of 112 is 

56

300

Half of 228 is

114

400

Half of 290 is 

145

500

half of 580 is

290

mix

100

67 + ? = 100

? = 33

200

18 x 5 = 

90

300

350 + ? = 1000

? = 650

400

80 divided by 4 is 

20

500

460 - 78 = 

382