Do not teach the kids the algorithym. Those kids who are seeing it, are struggling with using it and mixing it up with the strategies I've taught. The report cards are reporting if the kids can use the strategies that I have been told to teach.
Answer the following using partial sums, partial difference, number line or expanded addition.
1. 416 + 379 =
2. 416 - 379 =
3. 752 + 275 =
4. 752 - 275 =
You can use base10 on #5!
5. 78 + 89 + 98 + 45 + 57=
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