Show:
patterns
subtraction
addition
variables
multiplication
100

1,2,3,4,

5


100

2-1=

1

100

6+2=

8

100

Rx6=18

3

100

45x1=

45

200

2,5,8,

11

200

10-4=

6

200

11+12=

23

200

6xt=12

6

200

6x3=

18

300

3,6,4,2,

5

300

54-36=

18

300

54+56=

110

300

48/h=6

8

300

10x7=

70

400

10,20,10,

20

400

106-12=

94

400

112+52=

164

400

106/k=53

2

400

5x60=

300

500

114,134,154,

174

500

408-306=

102

500

502+406=

908

500

806xb=806

1

500

114x10=

1140