Maths strategy

A.                                                         

3x4=12

3x30=90

3x100=300

12+90+300=402

B.

4x3=12

4x30=120

4x200=800

12+120+800=932

C.

6x8=48

6x10=60

6x500=3000

48+60+3000=3108

D.

4x4=16

4x0=0

4x200=800

16+0+800=816

E.

6x2=12

6x40=240

6x100=600

12+240+600=852

F.

9x3=27

9x20=180

9x200=1800

G.

3x7=21

3x50=150

3x200=600

12+150+600=762

H.

7x4=28

7x20=140

7x100=700

28+140+700=868

I.

4x8=32

4x50=200

4x200=800

32+200+800=103