9 phan 14 + 8 phan 21
13 phan 15 - 7 phan 12
dua cac phan so ve cung mau so roi sap xep theo thu tu tu be den lon 2 phan 7 6 phan 14 30 phan 35 3 phan 21 2 phan 5 9 phan 45 8 phan 10 12 phan 20
12 phan 19 . 7 phan 15. -13 phan 17.19 phan 12 . 17 phan 13
bằng2527/3420
mik rut gọn rồi
đúng thì
đúng thì k
nhâm -1596/3420
chuyen ve cac phan so sau a, 3 va 7 phan 9 ;12 va 9 phan 11 ;6 va 2 phan 7 b, 14 va 1 phan 8 ; 124 va 4 phan 35
\(a,3\frac{7}{9}=\frac{3\cdot9+7}{9}=\frac{34}{9}\)
\(12\frac{9}{11}=\frac{12\cdot11+9}{11}=\frac{141}{11}\)
\(6\frac{2}{7}=\frac{6\cdot7+2}{7}=\frac{44}{7}\)
\(b,14\frac{1}{8}=\frac{14\cdot8+1}{8}=\frac{113}{8}\)
\(124\frac{4}{35}=\frac{124\cdot35+4}{35}=\frac{4344}{35}\)
cho a bang 8 phan 11 nhan 13 cong 8 phan 13 nhan 15 cong... cong 8 phan 19 nhan 21 va b bang 36 phan 231
cho a bang 8 phan 11 nhan 13 cong 8 phan 13 nhan 15 cong ... cong 8 phan 19 nhan 21 va b bang 36 phan 231
12 phan 17 : 4
12 : 6 phan 13
9 : 3 phan 5 * 4 phan 15
72 : 45
281,6 : 8
300,72 : 53,7
a)\(\frac{3}{17}\)
b)26
c)4
d)1,6
e)5,6
tk cho mik nhé
tính bằng cách hợp lý
3 phan 7 . 9 phan 26 - 1 phan 14 . 1 phan 13 - 1 phan 7
phan so bang phan so 21/15 la phan so nao trong day 14/10 ; 15/6 ; 7/5 la
cho a bang 8 phan 11 nhan 13 cong 8 phan 13 nhan 15 cong ... cong 19 nhan 21 va b bang 36 phan 231
-3 phan 13 nhan 7 phan 17 + 3 phan 17 nhan -14 phan 13 + 10 phan 3 phan 13