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中括号括号一点八减零点六括号除以方块加二点五种...

【(1.8-0.6)/()+2.5】*0.4=3.4

2.8*(2.8-1.2)/0.14=20*1.6=32

是5.8x(3.87-0.13)+4.2x3.741吗? 先算括号内3.87-0.13=3.74 然后先乘除后加减,5.8x3.74=21.692 , 4.2x3.741=15.7122 最后21.692+15.7122=37.4042

32÷(6/25) =32×(25/6) =400/3. (2/4)×0.8 =0.5×0.8 =0.4. 1.2+(1/4) =1.2+0.25 =1.45. 5.25-(1+1/4) =5.25-1.25 =4.

10.8÷【(5.2-1.6)×0.3】 =10.8÷【3.6×0.3】 =10.8÷1.08 =10

(-4.5)-(-2.8)-(-3.2)+(4.5) =2.8+3.2 =6

(7.2×2.4-9.48)÷0.25 =(17.28-9.48)÷0.25 =7.8×4 =31.2

(8-0.8)x12.5 =8x12.5-0.8x12.5 =100=10 =90 打字不易,请采纳

薇薇一笑倾城

(17/18-3/4+1/6)÷5/8 =13/36÷5/8 =26/45

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