Today in grade 3, the students have been discussing efficient mental math strategies.
We also discussed clues we read in math problems and how they help us know if we have to add or subtract or do both (example: sum, different, altogether).
Doubles: 4+4=8+2 = 10
Make ten 8+2= 10
As we roll the dice we add on each roll plus our previous total. What strategies help you to add quickly?
CHALLENGE: Start at 100 and subtract each time. Try subtracting using friendly numbers (2, 5, 10).
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How can adding and subtracting friendly numbers help you? |
How can real life math help with quick mental math?
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