\(=\dfrac{1}{2}+\dfrac{1}{3\times14}=\dfrac{1}{2}+\dfrac{1}{42}=\dfrac{11}{21}\)
Tính bằng cách thuận tiện nhất :
2/3 × 3/14+1/7×2/3+3/14×2
1/2+1/3:1/6;7/9 nhân 3/14:5/8
1/2 + 2/3 x 3/14 = ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????
tìm số tự nhin x bt
a.\(x-\)\(\dfrac{5}{14}=\dfrac{3}{7}-\dfrac{1}{14}\) b.\(\dfrac{2}{9}:x=\dfrac{1}{2}+\dfrac{2}{3}\) c.\(\dfrac{6}{32:x}=\dfrac{12}{16}\)
[13/2 + 14/6] - [5/15 + 1/3]
4/16 + 3/4 + 4/16 - 3/4
[35/70 - 2/10] + [14/8 - 1]
Tính : a. 2/7 + 3/7 x 5/2 b. 1/3 x 14 : 1/6
5/9+2/3+1/2=
5/12+3/4+1/3=
1/4+3/7+11/14=
