Multiplication
20*20=
400
400/2=
200
360/20=
18
16+2=
18
320-20=
300
19*20=
380
380/2=
190
340-180=
160
19
340-20=
320
18*20=
360/2=
180
180*20=
3,600
18+2=
20
360-20=
340
17*20=
340
340/2=
170
340+360=
700
19+2=
21
380-20=
360
16*20=
320
320/2=
160
3,600/18-20= 700+160*20=
180 3,900
20+2=
22
400-20=
380