viet phan so 23/30 thanh tong cua cac phan so co tu so la 1 con mau so khac nhau
hay viet phan so 1/2 thanh tong cua 3 phan so co tu so la 1 va mau so khac nhau
viet phan so 5/6 thanh tong cua cac phan so co tu so la 1 con mau so khac nhau
ta thấy 6 chia hết cho:6;3:2:1
5/6=2/6+3/6=1/3+1/2
chúc bạn học giỏi
\(\frac{5}{6}=\frac{1}{6}+\frac{2}{3};\frac{5}{6}=\frac{2}{6}+\frac{1}{2}\)
Ta có :
\(\frac{5}{6}=\frac{1}{2}+\frac{1}{3}\)
viet moi phan so sau day thanh tong cua ba phan so co tu so la 1 va mau so khac nhau : 7/8 ;11/12 ; 14/24
\(\frac{7}{8}=\frac{1}{8}+\frac{6}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{1}{8}+\frac{1}{4}+\frac{1}{2}\)
\(\frac{11}{12}=\frac{1}{12}+\frac{10}{12}=\frac{1}{12}+\frac{4}{12}+\frac{6}{12}=\frac{1}{12}+\frac{1}{3}+\frac{1}{2}\)
\(\frac{14}{24}=\frac{7}{12}=\frac{1}{12}+\frac{6}{12}=\frac{1}{12}+\frac{4}{12}+\frac{2}{12}=\frac{1}{12}+\frac{1}{3}+\frac{1}{6}\)
OK ban nhe
A; viet phan so 3\5 thanh tong cua hai phan so thap phan [viet ba cach khac nhau]
B;Viet phan so 1\2 thanh tong cua hai phan so thap phan co mau so khac nhau
viet phan so 5/21 thanh tong cua 3 so co tu la 1 va mau khac nhau
viet phan so 7 /32 thanh tong cua ba phan so co tu so la 1 con mau so khach nhau
Ta có :
\(\frac{7}{32}=\frac{1}{32}+\frac{1}{48}+\frac{1}{6}\)
7/32 = 1/32 + 1/48 + 1/6 nha e , cj hc lp 7 rùi , cj thik mở toán tiểu hc lên giải thoy àh , toán cấp 2 rối lắm e ơi , tk mk nha
hay viet phan so 1/2 thanh tong cua 3 phan so co tu so la1 va mau so khac nhau
hay viet phan so 31/32 thanh tong cua cac phan so co tu bang 1 va mau khac nhau
Tổng đó là: \(\frac{1}{1.2}+\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+...+\frac{1}{31.32}\)
31/32 = 1/32 + 30/32
= 1/32 + 15/16
= 1/32 + 7/16 + 8/16
= 1/32 + 7/16 + 1/2
= 1/32 + 1/2 + 5/16 + 2/16
= 1/32 + 1/2 + 5/16 + 1/8
= 1/32 + 1/2 + 1/8 + 1/16 + 4/16
= 1/32 + 1/2 + 1/8 + 1/16 + 1/4