题目内容

【题目】计算,能简算的要简算。

560+1440÷12×5×+× [1-+)]÷

5.8×99+5.8 +++……+

【答案】1160

580

【解析】

560+1440÷12×5

=560+120×5

=560+600

=1160

× + ×

= + ×

=1×

=

[1-+)]÷

=1- ÷

= ÷

=

5.8×99+5.8

=5.8×99+1

=5.8×100

=580

+ + + ……+

= + × + ×+×+……+×

= ×1+ + + +……+

= ×1+ + + +……+ ×256÷256

= ×256+128+64+32+16+8+4+2+1÷256

= ×511×

=

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