5/4 : 2/9 + 1/2 =45/8+1/2=45/8+4/8=53/8
\(=\dfrac{5}{4}\times\dfrac{9}{2}+\dfrac{1}{2}=\dfrac{45}{8}+\dfrac{1}{2}=\dfrac{49}{8}\)
\(\dfrac{45}8 + \dfrac48 = \dfrac{49}8\)
5/4 : 2/9 + 1/2 = 5/4 x 9/2 + 1/2 = 45/8 + 1/2 = 45/8 + 4/8 = 49/8
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5/4 : 2/9 + 1/2 =45/8+1/2=45/8+4/8=53/8
\(=\dfrac{5}{4}\times\dfrac{9}{2}+\dfrac{1}{2}=\dfrac{45}{8}+\dfrac{1}{2}=\dfrac{49}{8}\)
\(\dfrac{45}8 + \dfrac48 = \dfrac{49}8\)
5/4 : 2/9 + 1/2 = 5/4 x 9/2 + 1/2 = 45/8 + 1/2 = 45/8 + 4/8 = 49/8
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=?
tính
5-13/17
2/5-1/7
4/9-2/9
5/4-1/3
5/2-1/4-2/3
4/3-2/5+1/2
Chọn phép tính đúng:
A 1/2×1/2=1×1 2×2=1/4
B 3/5×4/9=3×9 5×4=2720
C 5/3×3/7=3×3 5×7=935
D 7/9×3/8=7×3/ 9×8=724
1+1+1+1+1+2+3+4+5+6+7+8+9+10 x 1+1+1+1+1+2+3+4+5+6+7+8+9+10 +1+1+1+1+1+2+3+4+5+6+7+8+9+10 - 10 x 9 - 9 + 45 +46 +47 =
Tính 9/5 + 3/4 4/7 x 3/8 6/7 x 2/3 - 2/7 3/5 - 2/9 5/9 ÷ 5/6 4/5 ÷2/5 x 1/4
Nhanh giúp mik nhá
a. 1/5 x 1/2 : 3/10 =
b. 2/3 : 6/5 : 2/9 =
c. 6/4 : 1/4 - 8/5 =
d. 0 : 4/5 x 6/9 =
1+1+1+2+2+2+3+3+3+4+4+4+5+5+5+6+6+6+7+7+7+8+8+8+9+9+9+.......+n
Tìm n
Tính giá trị biểu thức :
a, 3/4 + 1/2 x 7/2 b, 6/15 - 1/3 : 5/3
c, x - 4/9 = 3/7 : 9/4 d, 7/9 x 3/5 - 1/2 = 1/5