\(4\times\dfrac{2}{5}\times\dfrac{3}{4}\times\dfrac{1}{6}\times5\times6=\dfrac{8}{5}\times\dfrac{3}{24}\times5\times6=\dfrac{1}{5}\times5\times6=\dfrac{5}{5}\times6=1\times6=6\)
\(4\times\dfrac{2}{5}\times\dfrac{3}{4}\times\dfrac{1}{6}\times5\times6=\dfrac{8}{5}\times\dfrac{3}{24}\times5\times6=\dfrac{1}{5}\times5\times6=\dfrac{5}{5}\times6=1\times6=6\)
2/5x3/4+1/4x2/5
Tính bằng 2 cách:
a,2/5x3/7+2/5x4/7
b,(2/3-4/7)x5/5
c,3/4x2/5-3/4x2/7
a 3/4x2/9+1/3 b 5/4:2.9+1/2 c 7/2-1/4x1/5 d 5/4+1/5:2/3
giúp mik nha mình sắp phải nộp rồi
Bài 5 Tính nhanh giá trị của biểu thức a, 2/3x3/4x5/6x4/5 b,4/5-2/3+1/5+1/3 c,2/5x7/4-2/5x3//7 d,13/4x2/3x4/13x3/2 e,3/5x79-3/5x2/9 g,5/9x1/4+4/9x3/12 huhuhu......
1\2x1/4x1/6=
1/2x1/4;1/6=
1/2;1/4x1/6=
8x2x1/8x1/4x1/2x4
1984=1x10000+9x.... +8x10+4x1
3+2+2+2x8-1+4x1
Bài 5. Tính
a). 1/3+1/4-1/5
b).5/2+1/3-1/4
c).10/3-(1/4+1/12)
d).1/3+6/5-1/15
e).3/2+1/4-1/8
f).3/4x2/9+1/3
g).5/4:2/9+1/2
h).7/2-1/4x1/5
i).5/4+1/5:2/3
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THAK MNG NHÌU