计算：82009×（-0.125）2008+（-0.25）3×26

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问题解答题

计算：8²⁰⁰⁹×（-0.125）²⁰⁰⁸+（-0.25）³×2⁶

答案

原式=8²⁰⁰⁹×（-

）²⁰⁰⁸+（-

）³×2^{6
=8×8²⁰⁰⁸×（
1
8
）²⁰⁰⁸-2^-6×2⁶
=8×1-1
=7．}

选择题

Keep in mind that you should do the same things _____ in the instructions. [ ]

A. as are listed

B. which are listed

C. as listed

D. that listed

选择题

How many _____ are there in your class? [ ]

A. students

B. workers

C. doctors

D. secretaries