问题 解答题
脱式计算.(能简算的用简算)
3.47×6.5+6.53×6.586.3×19-86.3×966.96÷72-0.87.
答案

(1)3.47×6.5+6.53×6.5,

=(3.47+6.53)×6.5,

=10×6.5,

=65;

(2)86.3×19-86.3×9,

=86.3×(19-9),

=86.3×10,

=863;

(3)66.96÷72-0.87,

=0.93-0.97,

=0.06.

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