问题 解答题
脱式计算.
(4.2+4.2÷2.1)÷0.25.7×[29-(3.06+5.94)].
答案

(1)(4.2+4.2÷2.1)÷0.2,

=(4.2+2)÷0.2,

=6.2÷0.2,

=31.

(2)5.7×[29-(3.06+5.94)],

=5.7×[29-9],

=5.7×20,

=114.

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