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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.

题目详情
脱式计算.(能简算的用简算)
3.47×6.5+6.53×6.5
86.3×19-86.3×9
66.96÷72-0.87.
▼优质解答
答案和解析
(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.