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1/2加2/5,减3/10加3/5的脱式计算.

脱式计算 1/2+2/5-3/10+3/5 =(1/2-3/10)+(2/5+3/5) =1/5+1 =1又1/5

先转换在算 先5分之4减10分之3,5分之4转换也就是10之8减掉10分之3=10分之5转换2分之1 最后2分之1+3分之2 转换6分之3+6分之4最终答案是6分之7

14/15-(2/5+3/10) =14/15-7/10 =28/30-21/30 =7/30 , 你好,本题已解答,如果满意 请点右上角“采纳答案

=5/10-2/10+3/10 =6/10 =3/5

(1/2+1/7-2/5+3/14)x70 =1/2x70+1/7x70-2/5x70+3/14x70 =35+10-28+15 =45-13 =32 行家正解,不明白可以追问!祝您学习进步 满意请点击下面的【选为满意回答】按钮,O(∩_∩)O谢谢

5减3/10加5/6 =5+(25-9)/30 =5+8/15. 4/5加3/5加2/5减8/9 =4/5+1-8/9 =4/5+1/9 =41/45. 4/5减(7/10减7/20) =4/5-7/20 =9/20. 11/12减(1/6加3/4) =11/12-11/12 =0.

(4/5+1/10)+3/8 =9/10+3/8 =51/40 =1又11/40

3/5×(20+5/6) =3/5×20+3/5×5/6 =12+1/2 =12又1/2

(1+99)×99/2

.120-36×4÷18+35 2.(58+37)÷(64-9×5) 3.(6.8-6.8×0.55)÷8.5 4.0.12× 4.8÷0.12×4.8 5.(3.2×1.5+2.5)÷1.6 (2)3.2×(1.5+2.5)÷1.6 6.6-1.6÷4= 5.38+7.85-5.37= 7.7.2÷0.8-1.2×5= 6-1.19×3-0.43= 8.6.5×(4.8-1.2×4)= 0.68×1.9+0.32×1.9 9...

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