脱式 0.28*4.3+7.2*0.43 78.5+1.5*18/2.5 18.4+1.6*0.4*2.4 (6.8+1
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脱式 0.28*4.3+7.2*0.43 78.5+1.5*18/2.5 18.4+1.6*0.4*2.4 (6.8+1.7)*1.2/0.16
0.28*4.3+7.2*0.43
=2.8*0.43+7.2*0.43
=(2.8+7.2)*0.43
=10*0.43
=4.3
78.5+1.5*18/2.5
=78.5+27/2.5
=78.5+10.8
=89.3
18.4+1.6*0.4*2.4
=18.4+0.64*2.4
=18.4+1.536
=19.936
(6.8+1.7)*1.2/0.16
=8.5*1.2/0.16
=10.2/0.16
=63.75
=2.8*0.43+7.2*0.43
=(2.8+7.2)*0.43
=10*0.43
=4.3
78.5+1.5*18/2.5
=78.5+27/2.5
=78.5+10.8
=89.3
18.4+1.6*0.4*2.4
=18.4+0.64*2.4
=18.4+1.536
=19.936
(6.8+1.7)*1.2/0.16
=8.5*1.2/0.16
=10.2/0.16
=63.75
简便方法计算 脱式 (1) 32.7X99+32.7 (2)2.4除以2.5除以0.4
(3.2*1.5+2.5)/1.6 6/4-1.6/4 6-1.19*3-0.43 3.2*(1.5+2.5)/1.6
2.4/2.5+1.6*2.5
0.75×4.3+2.5×0.43简便计算,
能巧算的要巧算:(一)4.3*1.8+0.43*81+43*0.001 (二)99-11*2.5-33*1.5 (三){
简算 1.6×1.25 4.13×6.7+3.3×4.3 1.25×3.69×8 32.4÷2.5÷0.4
24除以6等于0.4 6除以2.4等于2.5 2.5*0.4等于1
简算17.64-(0.4*1.6-2.5)
(8.4*2.5+9.7)/(1.05/1.5+0.084/0.28)
求比值:0.7:2.4:1.6 1:100分之1 18
18-(1.4+1.25×2.4) 怎么算?(脱式)
7.2÷1.8+6.8×0.5 3.7+6.3÷0.6-0.4