Share M3 9.1 ADDITION (2)
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ESTIMATE 45 + 94
140
ESTIMATE 234 + 288
520 or 500
SOLVE 234 + 288
522
SOLVE 45 + 94
139
Add in a different way: 1 + 8 + 9
1 + 8 + 9 = 18
Do we need to regroup in 463 + 124?
Yes
No
Do we need to regroup in 246 + 986?
No
Yes
