Maths Lesson/Doubling and Halving

Today we had a lesson on doubling and halving. We had 2 equations.But you could work both problems with the same strategy. The strategy you could use with both equations is Doubling and Halving. Using Doubling and halving will give the same answer.

Here's my working out on both equations:

132x10=1320

D/12=6 and H/22=11

12x11=132 or

6x22=132

Same answer different working out.

I hope you learned something about this blog =)