脱式计算. (78+52)×(120÷60) (128-72)×12÷48 80-(16.405+14.9) 68.7-(44.6+0.375) 150×40×25×2 5625÷75+25×32.
问题描述:
脱式计算. (78+52)×(120÷60) |
(128-72)×12÷48 |
80-(16.405+14.9) | 68.7-(44.6+0.375) |
150×40×25×2 | 5625÷75+25×32. |
答
(1)(78+52)×(120÷60)=130×2=260;(2)(128-72)×12÷48=56×12÷48=672÷48=14;(3)80-(16.405+14.9)=80-31.305=48.695;(4)68.7-(44.6+0.375)=68.7-44.975=23.725;(5)150×40×25×2=(150...