问题 解答题

28×6.5-9.3

0.2×8.2×50

0.68×99+0.68

25×32×1.25

2.4+7.6×4.3

(4.85+1.15)×0.37.

答案

(1)28×6.5-9.3,

=182-9.3,

=172.7;

(2)0.2×8.2×50,

=(0.2×50)×8.2,

=10×8.2,

=82;

(3)0.68×99+0.68,

=0.68×(99+1),

=0.68×100,

=68;

(4)25×32×1.25,

=25×4×8×1.25,

=(25×4)×(8×1.25),

=100×10,

=1000;

(5)2.4+7.6×4.3,

=2.4+32.68,

=35.08;

(6)(4.85+1.15)×0.37,

=6×0.37,

=2.22.

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