1) N/2 + 1 1/3 = 4 2/3
2) x/3 + 2 1/2 = 4
點計 ??
thank you so much!!
方程問題1) N/2 + 1 1/3 = 4 2/3
2007-05-09 8:24 pm
回答 (3)
2007-05-09 8:36 pm
✔ 最佳答案
你可以先通分母…1) N/2+1又1/3=4又2/3
利用L.C.M 2 同 3 的共分母是6
so 在左右兩邊乘上6
N/2 *6+ 1又1/3*6=4又2/3*6
3N+8=28
3N=20
N=20/3
2) x/3 +2又1/2=4
2x+15=24
2x=9
x=9/2
2007-05-09 8:42 pm
N/2 + 1 1/3 = 4 2/3
N/2 + 4/3 = 14/3
3N / 6 + 8/6 = 28/6
3N + 8 = 28
3N = 20
N = 20/3
N = 6 2/3
x/3 + 2 1/2 = 4
x/3 + 5/2 = 4/1
2x/6 + 15/6 = 24/6
2x + 15 = 24
2x = 9
x = 4.5
N/2 + 4/3 = 14/3
3N / 6 + 8/6 = 28/6
3N + 8 = 28
3N = 20
N = 20/3
N = 6 2/3
x/3 + 2 1/2 = 4
x/3 + 5/2 = 4/1
2x/6 + 15/6 = 24/6
2x + 15 = 24
2x = 9
x = 4.5
2007-05-09 8:38 pm
好簡單，要計呢兩條數就先要消去d分母，即係n/2中既2同x/3中既3
方法係等號兩面同時乘分母，即係：
1)2*(n/2+1 1/3)=(4 2/3)*2
n+2 2/3=9 1/3
2)3*(x/3+2 1/2)=(4)*3
x+7 1/2=12
之後就同一般方程式咁計，你應該識啦
方法係等號兩面同時乘分母，即係：
1)2*(n/2+1 1/3)=(4 2/3)*2
n+2 2/3=9 1/3
2)3*(x/3+2 1/2)=(4)*3
x+7 1/2=12
之後就同一般方程式咁計，你應該識啦
參考: 自己
收錄日期: 2021-04-13 00:27:08
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