\(=\dfrac{1x7}{2x7}+\dfrac{3x2}{7x2}+\dfrac{11}{14}=\dfrac{7+6+11}{14}=\dfrac{12}{7}\)
\(=\dfrac{1x7}{2x7}+\dfrac{3x2}{7x2}+\dfrac{11}{14}=\dfrac{7+6+11}{14}=\dfrac{12}{7}\)
1/2+2/3+3/4+4/5+5/6+6/7+7/8+8/9+9/10+10/11+11/12+12/13+13/14+14/15=?
âm 2 phần 7 nhân 5 phần 3 âm 2 phần 7 nhân 1 phần 3 14 phần 25 27 phần 13 11 phần 25 14 phần 13 x 13 phần 11 x 3 phần 7 2 phần 3 giúp mình nhé
bài 1
4/7+4
3+6/11
3-5/7
21/9-2
15/24+2
63/45-20/25
3/4-2/8
6/7-5/8
37/45-5/9
46/39-11/13
5/12+3/4+1/3
1/2+3/7+11/14
7/10-(1/5+1/4)
15/4-2/3-3/4
5/9+2/3+1/2=
5/12+3/4+1/3=
1/4+3/7+11/14=
a)4/5-(1/5+1/3)
b)12/7-(3/14-1)
c)11/2-9(7/5-1/2)
d)3x9(4/7+3/5)
e) (1/3-1/5):2
f)123/34:1/17-21/34:1/17
1/2 +3/6 + 5/10 + 7/14 + 9/18 +11/22=
1*2*3*4*5*6*7*8*9**11*12*13*14=?????????????
Tính bằng cách thuận tiện nhất: a)1678*24+77*1678-1678 b)2/5 + 4/11 + 3/5 + 18/11 + 1/4 +1/6 c) 7/9x7 + 7/9x4 - 7/9x10 e)13/7x 2/3 - 6/7 : 6/4 +14/21 g)5/9x2/6+-5/9x3/6
Tính 1/2+3/6+5/10+7/14+9/18+11/22