问题 解答题

1.59×1.9+0.41×1.9-1.9

18.6-[12-0.328×(18.3+6.7)]

63÷[6.5×(3.4-3.32)+2.98]

96.12÷[(7-6.46)×(43.6+56.4)]

[49.84-(53.17-14.56)÷27]÷0.47.

答案

(1)1.59×1.9+0.41×1.9-1.9,

=(1.59+0.41-1)×1.9,

=1×1.9,

=1.9;

(2)18.6-[12-0.328×(18.3+6.7)],

=18.6-[12-0.328×25],

=18.6-[12-8.2],

=18.6-3.8,

=14.8;

(3)63÷[6.5×(3.4-3.32)+2.98],

=63÷[6.5×0.08+2.98],

=63÷[0.52+2.98],

=63÷3.5,

=18;

(4)96.12÷[(7-6.46)×(43.6+56.4)],

=96.12÷[0.54×100],

=96.12÷54,

=1.78;

(5)[49.84-(53.17-14.56)÷27]÷0.47,

=[49.84-38.61÷27]÷0.47,

=[49.84-1.43]÷0.47,

=48.41÷0.47,

=103.

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