\(\dfrac{7}{3}\times\dfrac{1}{2}+\dfrac{1}{7}=\dfrac{7}{6}+\dfrac{1}{7}=\dfrac{49}{42}+\dfrac{6}{42}=\dfrac{55}{42}\)
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Bài 1:Tính
a.1/5x1/2:1/3 b.2/9:2/3x1/2
c.1/2x1/3+1/4 c.2/7:2/3-1/7
Giúp mình nhé :)
tính:
3/7x7/3
3/7:3/7
2/3x1/6x9/11
2x3x4 trên 2x3x4x5
4/3x1/7+4/7x1/11+4/11x1/15+4/15x1/19=?
a)2/9:2/3x1/2. b)2+1/4x4/3
c)3x1/2x1/4
1/2-1/3x1/4
1/2+4/3x1/6
Tinh
8/9-1/3x1/2=
(1/1x1/2) + (1/2x1/3) + (1/3x1/4) + (1/4x1/5) +....+ (1/72x1/73) =
1/2+1/3X1/9=?
trả lời đúng là tick , nhưng nhanh nữa he