A group of middle school girls is puzzling over a pie chart about reading habits in the U.S. Their “math designer” stands at ...
A group of middle school girls is puzzling over a pie chart about reading habits in the U.S. Their “math designer” stands at the front of the room, encouraging students ...
19 is only 1 away from 20, so you prefer to start by multiplying 20 times 5, which equals 100. Then we need to take away a squadron of 5, because there are actually only 19 squadrons, not 20. 100 take ...
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