Mrs. Mitchell is making bread. Each loaf of bread requires 1.5 cups of flour. If she has 12 cups of flour, how many loaves of bread can she make?

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Answer 1 · 2016-10-06T19:22:19

#8" "#loaves

The thinking process could be: Every #1 1/2# cups of flour is another loaf of bread. How many times can I get #1 1/2# cups from 12 cups?

Think about scooping #1 1/2# cups at a time from a bowl of 12 cups of flour.

#12- 1 1/2 -1 1/2- 1 1/2 .....# until the bowl is empty.

However, the short cut for repeated subtraction is division.

"How many portions of #1 1/2# cups can I get out of 12?" is the same as:
#12 div 1 1/2#

#=12 div 3/2#

#=cancel12^4 xx 2/cancel3#

#=8 " "#times