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用递等式计算.(可用简便算法)5710×310+310×31023+(47+12)×7258
问题详情
用递等式计算.(可用简便算法)
(
1
参考答案
(1)5710×310+310×310,
=(5710+310)×310,
=6×310,
=95;
(2)23+(47+12)×725,
=23+1514×725,
=23+310,
=2930;
(3)813÷7+17×613,
=813×17+17×613,
=(813+613)×17,
=1413×17,
=213;
(4)813÷7+17×713,
=813×17+17×713,
=(813+713)×17,
=1513×17,
=1591;
(5)(112+12-712)÷17,
=(712-712)÷17,
=0÷17,
=0;
(6)115÷0.24-1.6×34,
=5-1.2,
=3.8.
考点:等式,算法