\(\dfrac{5}{2}\) : \(\dfrac{1}{4}\) - \(\dfrac{1}{8}\) = 10 - \(\dfrac{1}{8}\) = \(\dfrac{79}{8}\)
\(\dfrac{5}{2}:\dfrac{1}{4}-\dfrac{1}{8}=\dfrac{5}{2}\times\dfrac{4}{1}-\dfrac{1}{8}=10-\dfrac{1}{8}=\dfrac{80}{8}-\dfrac{1}{8}=\dfrac{79}{8}\)
\(\dfrac{5}{2}\) : \(\dfrac{1}{4}\) - \(\dfrac{1}{8}\) = 10 - \(\dfrac{1}{8}\) = \(\dfrac{79}{8}\)
\(\dfrac{5}{2}:\dfrac{1}{4}-\dfrac{1}{8}=\dfrac{5}{2}\times\dfrac{4}{1}-\dfrac{1}{8}=10-\dfrac{1}{8}=\dfrac{80}{8}-\dfrac{1}{8}=\dfrac{79}{8}\)
1) 1/3 x 1/2 x 3/7 2) 5/4 x 1/3 + 1/7 3) 8 x ( 8/9-2/3 ) 4) 5/6 x 48/20 x 1/2 5) ( 2/5 + 3/4 ) x 8 6) 10 x ( 1/2-1/5 )
2/5+2/3+3/4
2/6+3/12
5/6+1/3
1/3+5/12+5/6
5/8+4/7
1/5+5/35
5/8+3/4
1/6+1/3+1/12
1/6+5/24+2/3
7/3+8/7
2/5+1/6
1/7+1/4+6/7+3/4
giúp với
và ai giải được gọi cụ
a) 5/2 nhân 1/4 - 1/8=..............................................................................................................................................................
b) 5/2 + 1/4 nhân 1/8=.............................................................................................................................................................
c) 5/2 : 1/4 -1/8=.......................................................................................................................................................................
d) 5/2 + 1/4 : 1/8 =.....................................................................................................................................................................
giải hộ mình luôn nhé . không biết tớ có làm phiền các bạn không ? ^ _ ^ !
1.Khoanh vào các phân số bằng nhau
a.1/2, 2/4, 5/8, 4/8, 9/10, 3/6
b.1/4, 2/9, 2/8, 3/12, 5/16, 5/20
c.2/5, 4/15, 8/20, 8/25, 10/25, 12/20
C=3/2+3/4+3/8+3/16+...+3/128
D=1/2+1/4+1/8+...+1/1024
E=5/2+5/8+5/32+5/128+5/512+5/2048
1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9+1+2+3+4+5+6+7+8+9=?
Câu 1:tính
a,3/4+1/8=.......... b,4/5+3/10=..............
x-5/7=3/5*1/2 x*2/3=8/8+3/4
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Bài 299: Tính
1) 1/3 x 1/2 x 3/7
2) 5/4 x 1/3 + 1/7
3) 8 x ( 8/9-2/3 )
4) 5/6 x 48/20 x 1/2
5) ( 2/5 + 3/4 + x 8
6) 10 x ( 1/2 - 1/5 )
Trình bày rõ cách làm giúp ạ!!
GHI ĐẦY ĐỦ CÁC BƯỚC: 2/3+3/4, 4/5-1/3, 4 nhân 8/3, 1/8 nhân 3, 5:1/2, 2/5:4
Câu 4: (1 điểm): Đúng ghi Đ, sai ghi S vào ô trống:
a)8/6 - 1 >2/6 b)5/12+ 2 > 6/4
c.3/4+10/8 = 2 d.5/8 = 1 : 8/5