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急急急,2.4x0.19+0.24x8.1简便运算脱式计算怎么...

=2.4×0.19+2.4×0.81 =2.4×(0.19+0.81) =2.4×1 =2.4

见图

原式 =(1.08÷0.27)x0.8 =4x0.8 =3.2

10.1*8-0.8 =10.1*8-0.1*8 =(10.1-0.1)*8 =10*8 =80

8.1÷4.5÷0.2 =8.1÷(4.5×0.2) =8.1÷0.9 =9

0.8×1.2÷0.8×1.2 =(0.8÷0.8)×(1.2×1.2) =1×1.44 =1.44

额,你要什么类型的

(1)8/9×[7/8-(7/16-1/8)](2)10×3/4+17×75%-7×0. =8/9×[7/8-7/16+1/8] =8/9×[7/8+1/8-7/16] =8/9×[1-7/16] =8/9×9/16 =1/2 (2)10×3/4+17×75%-7×0.75 [3/4=75%=0.75] =0.75×(10+17-7) =0.75×20 =15

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