来自董为众的问题
(2014•南郊区模拟)脱式计算.①(2.8+4.6)×(2.6-2.1)②0.25×(32+64)÷0.6③910÷[12×(65-310)]④429×[1-(34-38)].
(2014•南郊区模拟)脱式计算.
①(2.8+4.6)×(2.6-2.1)
②0.25×(32+64)÷0.6
③910÷[12×(65-310)]
④429×[1-(34-38)].


(2014•南郊区模拟)脱式计算.①(2.8+4.6)×(2.6-2.1)②0.25×(32+64)÷0.6③910÷[12×(65-310)]④429×[1-(34-38)].
(2014•南郊区模拟)脱式计算.
①(2.8+4.6)×(2.6-2.1)
②0.25×(32+64)÷0.6
③910÷[12×(65-310)]
④429×[1-(34-38)].
①(2.8+4.6)×(2.6-2.1)
=7.4×0.5
=3.7
②0.25×(32+64)÷0.6
=0.25×96÷0.6
=24÷0.6
=40
③910