问题 解答题
0.84×1.2=4.48÷3.2=536÷0.4=
0.58×3.2=7÷0.35=8×0.25×125
0.68+1.8÷5+7.612.43×99+2.4338.5×7.2+38.5×2.8.
答案

(1)0.84×1.2=1.008;

0.8 4

×1.2
168

84
1.008

(2)4.48÷3.2=1.4;

(3)536÷0.4=1340;

(4)0.58×3.2=1.856;

0.5 8

×3.2
116

174
1.856

(5)7÷0.35=20;

(6)8×0.25×125,

=8×125×0.25,

=1000×0.25,

=250;

(7)0.68+1.8÷5+7.61,

=0.68+0.36+7.61,

=1.04+7.61,

=8.65;

(8)2.43×99+2.43,

=2.43×(99+1),

=2.43×100,

=243;

(9)38.5×7.2+38.5×2.8,

=38.5×(7.2+2.8),

=38.5×10,

=385.

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