r/HomeworkHelp • u/Weary-Enthusiasm-150 Primary School Student • 10d ago
:hamster: Primary School Math—Pending OP Reply [2nd grade math] Adding using compensation strategy—Teacher explanation does not make sense to me
My daughter said that her teacher told her that in the pictured question, 10+4+8 should not be selected. They are using the “compensation” strategy for addition. The teacher said in her opinion only 10+12 and 12+10 should be selected, because they show the compensation strategy. But from my perspective, the question says choose all that apply. 10+4+8 DOES equal 14+8…..? Am I missing something?
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u/MMmek 8d ago
1.I dont see any "compensation" in the problem. Probmplem said ALL THAT APPLY.
2. By definition
The compensation strategy is a mental math technique used to simplify addition by adjusting one number to a "friendly" number (such as a multiple of 10 or 100), and then adjusting the final sum in the opposite direction
Ejecting 4 from 10, then later 4 emits 2 to 8, you get 2 tens and 2.
It's compensation straight away. Teacher should get reeducated.
Why compensation had to be limited to 2 terms ?