Simplify the following 2+5 (2-4^2)-19?

2009-12-02 3:03 pm

回答 (2)

2009-12-02 3:07 pm
✔ 最佳答案
2 + 5(2 - 4^2) - 19
= 2 + 5(2 - 16) - 19
= 2 + 5(2) - 5(16) - 19
= 2 + 10 - 80 - 19
= 12 - 80 - 19
= -68 - 19
= -87
2009-12-02 11:12 pm
2 + 5 ( 2 - 16 ) - 19

2 + 5 ( - 14 ) - 19

2 - 70 - 19

2 - 89

- 87


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