1-(1\/3一4\/21)+2\/7等于几怎么算脱式计算
一般来说,等号要往前,不与第一行对齐。也就是离开原式计算。 1-(1\/3一4\/21)+2\/7 =1-(7\/21-4\/21)+2\/7 =1-3\/21+2\/7 =1-1\/7+2\/7 =1-(1\/7-2\/7) =1+1\/7 =8\/7 计算,能简算的要简算;3*(2\/3+1\/12)-1\/4 {1-(1\/7+4\/21)}\\4\/15 =2+1\/...
x-(4\/21+2\/7)=1\/3怎么做?
解方程:x-(4\/21+2\/7)=1\/3 x-10\/21=1\/3 x=1\/3+10\/21 x=17\/21
1-(3\/1-21\/4)+7\/2用简便方法计算的过程?
1-(3\/1-21\/4)+7\/2 =1-(3-21\/4)+14\/4 =(1-3)+(21\/4+14\/4))=-2+35\/4 =6又3\/4
1-1\/3-2\/7等于多少要过程?
您好 这个题只要一步步算就可以了 首先1-1\/3等于2\/3 下一步用2\/3减去2\/7 需要先将分母化统一 3 7的最小公倍数为21 故 变为14\/21-6\/21 结果等于8\/21
1-1\/3+1\/5+3\/10脱式计算等于多少?
1-1\/3+1\/5+3\/10 =1一1/3+(2/10十3/10)=1一1/3+1/2 =2/3十1/2 =4/6+3/6 =7/6
一减二分之一减四分之一减七分之一怎么脱式计算?
=1\/4 五分之三减二分之一加四分之十三减四分之十一,脱式 =3\/5-1\/2+(13\/4-11\/4)=3\/5-1\/2+1\/2 =3\/5 四分之三加六分之十一加三分之七乘二分之九,脱式 =31\/12+21\/2 =94\/12 =47\/6 =7又5\/6 (三分之二减二分之一)减(三分之一加六分之五)脱式 =1\/6-7\/6...
(1\/14+1\/35+1\/21)÷2\/7计算
(1\/14+1\/35+1\/21)÷2\/7=1\/14÷2\/7+1\/35÷2\/7+1\/21÷2\/7=1\/4+1\/10+1\/6=5\/20+2\/20+1\/6=7\/20+1\/6=21\/60+10\/60=31\/60
1\/14+5\/21+2\/7怎么简便运算?
解:分母通分后再运算:1\/14+5\/21+2\/7 =(1×3+5×2+2×6)\/42 =25\/42
1\/2。十。4\/7。加2\/3。怎么列脱式计算?
如图所示
计算:(1\/2)-(1\/3)-(1\/4)+(1\/5)?
4\/7+1\/14-1\/2 =8\/14+1\/14-7\/14 =2\/14 =1\/7 5\/3-3\/8-5\/8 =5\/3-(3\/8+5\/8)=5\/3-1 =2\/3 3\/5+3\/11+7\/5+11 =(3\/5+7\/5)+11+3\/11 =2+11+2\/11 =13又2\/11 3\/4-{5\/6-1\/3} =3\/4-(5\/6-2\/6)=3\/4-1\/2 =3\/4-2\/4 =1\/4 3\/4+1\/5=4\/...