问题 解答题

①6.81+6.81×99

②0.25×185×40

③3.94+34.3×0.2

④3.6÷0.4-1.5×3

⑤2.08×(9.6÷2.4)÷4.8

⑥68.1-77.7÷0.7×0.5.

答案

①6.81+6.81×99,

=6.81×(1+99),

=6.81×100,

=681;

②0.25×185×40,

=0.25×40×185,

=10×185,

=1850;

③3.94+34.3×0.2,

=3.94+6.86,

=10.8;

④3.6÷0.4-1.5×3,

=9-4.5,

=4.5;

⑤2.08×(9.6÷2.4)÷4.8,

=2.08×4÷4.8,

=8.32÷4.8,

=1.7

3

⑥68.1-77.7÷0.7×0.5,

=68.1-111×0.5,

=68.1-55.5,

=12.6.

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