问题 解答题
递等式计算(能简算的要简便计算).
3.6÷(3.6+1.2),26.18÷(5.2-3.5)+0.06(31.6-11.7)÷2.5÷0.4
[11÷(1-0.8)]÷0.120.12×48-201.2×1.4+2012×0.66.
答案

①3.6÷(3.6+1.2)

=3.6÷4.8

=0.75

②26.18÷(5.2-3.5)+0.06

=26.18÷1.7+0.06

=15.4+0.06

=15.46

③(31.6-11.7)÷2.5÷0.4

=19.9÷(2.5×0.4)

=19.9

④[11÷(1-0.8)]÷0.1

=[11÷0.2]÷0.1

=55÷0.1

=550

⑤20.12×48-201.2×1.4+2012×0.66

=20.12×48-20.12×14+20.12×66

=20.12×(48-14+66)

=20.12×100

=2012

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