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OpenStudy (kingkool567):
Add. Use estimation to check that your answer is reasonable. 550 + 679 A. 1129 B. 1139 C. 1219 D. 1229 Is it D?
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sammixboo (sammixboo):
Right :)
OpenStudy (kingkool567):
Ty.
OpenStudy (melodyeason74):
yes this is correct, even if this is a little late
OpenStudy (kingkool567):
It's ok. I still gave both of you a medal anyways.
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