问题 解答题

①32×0.25×1.25

②5.4+0.7+9.3+4.6

③2.4×2-0.65-0.55

④0.125×(80×8)

答案

①32×0.25×1.25,

=(4×0.25)×(8×1.25),

=1×10,

=10;

②5.4+0.7+9.3+4.6

=(5.4+4.6)+(0.7+9.3),

=10+10,

=20;

③2.4×2-0.65-0.55

=4.8-(0.65+0.55),

=4.8-1.2,

=3.6;

④0.125×(80×8),

=0.125×8×80,

=1×80,

=80.

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