题目内容
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. |
(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.
=(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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