Estimate each sum to the nearest ten:
5. (57 +34)
6. (43 +78)
8. (86 +19)
9. (95 + 58)
11. (356 + 275)
12. (463 + 182
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Answer:
5. 90
6. 120
8. 110
9. 160
11. 640
12. 640
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