问题 解答题

怎样简便就怎样算.

70-29.6-10.4  

0.9+1.08+0.92+0.1

90÷(3.6-1.8)+5.1  

0.36÷[(6.1-4.6)×0.8].

答案

(1)70-29.6-10.4,

=70-(29.6+10.4),

=70-40,

=30;

(2)0.9+1.08+0.92+0.1,

=(0.9+0.1)+(1.08+0.92),

=1+2,

=3;

(3)90÷(3.6-1.8)+5.1,

=90÷1.8+5.1,

=50+5.1,

=55.1;

(4)0.36÷[(6.1-4.6)×0.8],

=0.36÷[1.5×0.8],

=0.36÷1.2,

=0.3.

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