问题 解答题
〔0.5+(2-0.75)〕×1.610.73-4.76-5.24
17.4×2.43-1.43×7.42.2+(4.72-2.8)÷0.4.
答案

(1)[0.5+(2-0.75)]×1.6,

=[0.5+1.25]×1.6,

=1.75×1.6,

=2.8;

(2)10.73-4.76-5.24,

=10.73-(4.76+5.24),

=10.73-10,

=0.73;

(3)17.4×2.43-1.43×7.4,

=42.282-10.582,

=31.7;

(4)2.2+(4.72-2.8)÷0.4,

=2.2+1.92÷0.4,

=2.2+4.8,

=7.

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