Calculate

[wrb]

Will you calculate 123x645. Will you break down each number and tell me why you put each number where you did. I'd like to pay close attention to your reasoning.

 

[arthur ohlsten]

123 = 100+20+3

645 x3=1935
645 x 20= 12900
645 x 100=64500

we will now multiply as we did in 4th grade
......................645
.....................x123
.................._______
.....................1935
................... 1290
....................645
.................._________
...................79335

hope this helps, we leave off the end 0's
Arthur