How to do this sum?
20/5+50/7
2006-11-19 09:48:51 · 5 個解答 · 發問者 Hidden Profile 3 in 科學 ➔ 數學
and 5/4+98=?
2006-11-19 09:59:02 · update #1
中文係咪叫通分....???
20/5+50/7
(20/5)x7+(50/7)x5
140/35+250/35
390/35
78/7
將分母通做35
同分母就可以相加
但係分母乘左幾多
分子都要乘番幾多
or
20/5+50/7
4+50/7
28/7+50/7
78/7
(20/5=4)
2006-11-19 09:56:15 · answer #1 · answered by ? 3 · 0⤊ 0⤋
140/35+250/35 =390/35
2006-11-19 10:35:53 · answer #2 · answered by chanhyandy01 1 · 0⤊ 0⤋
20/5+50/7:
= 4+ 7.142
= 11.142
* 這個符號--> / is the meaning of ÷ in math
2006-11-19 09:54:59 · answer #3 · answered by Jackie 2 · 0⤊ 0⤋
20/5 + 50/7
= 140/35 + 250/35
= (140 + 250) / 35
= 390/35
= 11 5/35
2006-11-19 09:52:23 · answer #4 · answered by vegitou 7 · 0⤊ 0⤋
20/5+50/7
=140/35+250/35
=390/35
=78/7
2006-11-19 09:52:03 · answer #5 · answered by Shirley 3 · 0⤊ 0⤋