Question

please solve
Multiply using duplication and multiplication
8x 363
20x 16

Answer 1

8 x 363:
8 = 2 x 2 x 2
2 x 363 = 726
2 x 726 = 1452
2 x 1452 = 2904
So& 8 x 363 = 2904.

20 x 16:
& 20 = 2 x 10
16 x 2 = 32
32 x 10 = 320.
So& 20 x 16 = 320.