计算,怎样简便怎样算. 1.25×0.5×8×0.2 0.97×9+0.97 5.4÷[3×﹙3.8-2.9﹚].
第1个回答 2020-01-09
(1)1.25×0.5×8×0.2, =(1.25×8)×(0.5×0.2), =10×0.1, =1; (2)0.97×9+0.97, =0.97×(9+1), =0.97×10, =9.7; (3)5.4÷[3×﹙3.8-2.9﹚], =5.4÷[3×0.9], =5.4÷2.7, =2.