7. Simplify.
(a) 426624 + 253886 - 305167
(c) 18402013 - 6641325 - 382047 + 38204
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Answer:
- 426624+253886=680510-305167=375343
- 18402013 - 6641325=11760688- 382047=11378641+38204=11416845
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