Show:
Doubles
Addition
Subtraction
Bridge to 10
5's
100

4+4=

8

100

7+3=

10

100

9-6=

3

100

6+4=

10

100

15+15=

30

200

33+33=

66

200

25+6=

31

200

46-8=

38

200

12-9=

12-10= 2

12-9=3

200

45+45=

90

300

What is 16 doubled?

32

300

48+13=

61

300

98-75=

23

300

87-8=

87-10=77

87-9= 78

87-8= 79

300

555+555=

1110

400

18-9=

9

400

229+41=

270

400

354-87=

267

400

127-19=

127-20=107

127-19=108

400

150-24=

150-25=125

150-24=126

500

120 divided by 2

60

500

1234+567

1801

500

9874-563=

9311

500

574-47=

574-50=524

574-47=527

500

500 divided by 5

100