A-A+
脱式计算 能简算的要简算. 511×79+79×61151×10110.25-3.75-6.
问题详情
脱式计算,能简算的要简算.
参考答案
(1)511×79+79×611,
=(511+611)×79,
=1×79,
=79;
(2)51×101,
=51×(100+1),
=51×100+51×1,
=5100+51,
=5151;
(3)10.25-3.75-6.25+7.75,
=(10.25+7.75)-(3.75+6.25),
=18-10,
=8;
(4)35×12+350÷70,
=420+5,
=425;
(5)3+0.7÷[(56-14)×24],
=3+0.7÷[56×24-14×24],
=3+0.7÷[20-6],
=3+0.7÷14,
=3+0.05,
=3.05;
(6)13÷65×910,
=518×910,
=14.
考点: