rút gọn các phân số sau:
a,\(\dfrac{8.5-8.2}{16}\)
b,\(\dfrac{2.14}{7.8}\)
c\(\dfrac{11.4-11}{2-13}\)
d,\(\dfrac{17.5-17}{3-20}\)
e,\(\dfrac{49+7.49}{49}\)
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rút gọn các phân số sau:
a) \(\dfrac{22}{55}=\) b) \(\dfrac{-63}{81}=\)
c)\(\dfrac{2.14}{7.8}=\) d)\(\dfrac{49+7.49}{49}=\)
a) \(\dfrac{22}{55}=\dfrac{2}{5}\)
b) \(\dfrac{-63}{81}=\dfrac{-7}{9}\)
c) \(\dfrac{2.14}{7.8}=\dfrac{2.7.2}{7.2.2.2}=\dfrac{1}{2}\)
d) \(\dfrac{49+7.49}{49}=\dfrac{49.\left(7+1\right)}{49}=\dfrac{49.8}{49}=8\)
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\(\dfrac{22}{55}=\dfrac{2}{5}\) \(\dfrac{-63}{81}=\dfrac{-7}{9}\)
\(\dfrac{2.14}{7.8}=\dfrac{28}{56}=\dfrac{1}{2}\) \(\dfrac{49+7.49}{49}=8\)
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Rút gọn :
a) \(\dfrac{3.5}{8.24}\)
b) \(\dfrac{2.14}{7.8}\)
c) \(\dfrac{3.7.11}{22.9}\)
d) \(\dfrac{8.5-8.2}{16}\)
e) \(\dfrac{11.4-11}{2-13}\)
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rút gọn các phân số sau:
a,\(\dfrac{8.5-8.2}{16}\)
b,\(\dfrac{17.5-17}{3-20}\)
a) \(\dfrac{8,5-8,2}{16}=\dfrac{0,3}{16}=\dfrac{0,3\cdot10}{16\cdot10}=\dfrac{3}{160}\)
b) \(\dfrac{17\cdot5-17}{3-20}=\dfrac{17\cdot\left(5-1\right)}{-17}=\dfrac{1\cdot4}{-1}=-4\)
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a)
\(\dfrac{8\cdot5-8\cdot2}{16}=\dfrac{8\left(5-2\right)}{16}=\dfrac{3}{2}\)
b)
\(\dfrac{17\cdot5-17}{3-20}=\dfrac{17\left(5-1\right)}{-17}=\dfrac{4}{-1}=-4\)
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\(\dfrac{8.5-8.2}{16}\) \(\dfrac{11.4-11}{2-13}\)
bài 4 ý mn giúp mình nhe !
Ta có: \(\dfrac{8.5-8.2}{16}=\dfrac{8\left(5-2\right)}{16}=\dfrac{8.3}{16}=\dfrac{3}{2}\)
\(\dfrac{11.4-11}{2-13}=\dfrac{11\left(4-1\right)}{-11}=\dfrac{11.3}{-11}=-3\)
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13 tháng 3 2022 lúc 9:45
Câu 10: (0,5đ) Kết quả khi rút gọn dfrac{8.5-8.2}{16} là:A. dfrac{5-16}{2}dfrac{11}{2} B.dfrac{40-2}{2}dfrac{38}{2}19C.dfrac{40-16}{16}40 D.dfrac{8.left(5-2right)}{16}dfrac{3}{2} 11.Kết quả của phép trừ dfrac{1}{27}-dfrac{1}{9} làA.dfrac{0}{18} B.dfrac{1-3}{27}dfrac{-2}{27} C.dfrac{2}{27} D.dfrac{5}{4}
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Câu 10: (0,5đ) Kết quả khi rút gọn \(\dfrac{8.5-8.2}{16}\) là:
A. \(\dfrac{5-16}{2}=\dfrac{11}{2}\) B.\(\dfrac{40-2}{2}=\dfrac{38}{2}=19\)
C.\(\dfrac{40-16}{16}=40\) D.\(\dfrac{8.\left(5-2\right)}{16}=\dfrac{3}{2}\)
11.Kết quả của phép trừ \(\dfrac{1}{27}-\dfrac{1}{9}\) là
A.=\(\dfrac{0}{18}\) B.=\(\dfrac{1-3}{27}=\dfrac{-2}{27}\)
C.\(\dfrac{2}{27}\) D.=\(\dfrac{5}{4}\)
Rút gọn :
a) \(\dfrac{4.7}{9.32}\) b) \(\dfrac{3.21}{14.15}\) c) \(\dfrac{2.5.13}{26.35}\)
d) \(\dfrac{9.6-9.3}{18}\) e) \(\dfrac{17.5-17}{3-20}\) f) \(\dfrac{49+7.49}{49}\)
a) \(\dfrac{4.7}{9.32}=\dfrac{4.7}{9.4.8}=\dfrac{7}{72}\) b) \(\dfrac{3.21}{14.15}=\dfrac{3.7.3}{7.2.3.5}=\dfrac{3}{10}\)
c) \(\dfrac{2.5.13}{26.35}=\dfrac{2.5.13}{2.13.5.7}=\dfrac{1}{7}\) d)\(\dfrac{9.6-9.3}{18}\) \(=\dfrac{9.\left(6-3\right)}{9.2}=\dfrac{9.3}{9.2}=\dfrac{3}{2}\)
e) \(\dfrac{17.5-17}{3-20}=\dfrac{17.\left(5-1\right)}{-17}=-\dfrac{17.4}{17}=-4\) f) \(\dfrac{49+7.49}{49}=\dfrac{49.\left(1+7\right)}{49}=8\)
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Các bn ơi giúp mk câu này vs lun nha
Câu 1: Rút gọn:
a, dfrac{32}{12}
b, dfrac{-26}{156}
c,dfrac{4.7}{9.32}
d,dfrac{2.5.13}{26.35}
e, dfrac{7.6-9.13}{18}
f, dfrac{17.5-17}{3-20}
g, dfrac{49+7.49}{49}
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Các bn ơi giúp mk câu này vs lun nha
Câu 1: Rút gọn:
a, \(\dfrac{32}{12}\) =
b, \(\dfrac{-26}{156}\)=
c,\(\dfrac{4.7}{9.32}\)=
d,\(\dfrac{2.5.13}{26.35}\)=
e, \(\dfrac{7.6-9.13}{18}\)=
f, \(\dfrac{17.5-17}{3-20}\)=
g, \(\dfrac{49+7.49}{49}\)=
a) \(\dfrac{32}{12}=\dfrac{4.8}{4.3}=\dfrac{8}{3}\)
b) \(\dfrac{-26}{156}=\dfrac{-26}{26.6}=\dfrac{-1}{6}\)
c) \(\dfrac{4.7}{9.32}=\dfrac{4.7}{9.4.8}=\dfrac{7}{9.8}=\dfrac{7}{72}\)
d) \(\dfrac{2.5.13}{26.35}\dfrac{2.5.13}{2.13.5.7}=\dfrac{1}{7}\)
e)\(\dfrac{7.6-9.13}{18}=\dfrac{42-117}{18}=\dfrac{-75}{18}=\dfrac{-25.3}{6.3}=\dfrac{-25}{6}\)
f) \(\dfrac{17.5-17}{3-20}=\dfrac{17.\left(5-1\right)}{-17}=-4\)
g) \(\dfrac{49+7.49}{49}=\dfrac{49.\left(1+7\right)}{49}=8\)
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a, \(\dfrac{32}{12}=\dfrac{8}{3}\)
b, \(\dfrac{-26}{156}=\dfrac{-1}{6}\)
c, \(\dfrac{4.7}{9.32}=\dfrac{4.7}{9.4.8}=\dfrac{7}{72}\)
d,\(\dfrac{2.5.13}{26.35}=\dfrac{2.5.13}{2.13.7.5}=\dfrac{1}{7}\)
e,\(\dfrac{7.6-9.13}{18}=\dfrac{3\left(7.2-3.13\right)}{18}=\dfrac{-25}{6}\)
f ,\(\dfrac{17.5-17}{3-20}=\dfrac{17\left(5-1\right)}{-17}=-4\)
g,\(\dfrac{49+7.49}{49}=\dfrac{49\left(1+7\right)}{49}=8\)
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a, \(\dfrac{32}{12}\) = \(\dfrac{8}{3}\)
b. \(\dfrac{-26}{156}\) = \(\dfrac{-1}{6}\)
c, \(\dfrac{4.7}{9.32}\) = \(\dfrac{7}{72}\)
d, \(\dfrac{2.5.13}{25.36}\) = \(\dfrac{936}{5}\)
e, \(\dfrac{7.6-9.13}{18}\) = \(\dfrac{-25}{6}\)
f, \(\dfrac{17.5-17}{3-20}\) = -4
g, \(\dfrac{49+7.49}{49}\) = 8
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Rút gọn các phân số sau về phân số tối giản
3.5 2,14 3.7.11 8.5-8.2 11.4-11 3.21 2.5.13 9.6-9.3 17.5-17 49+7.498,24 7,8 22.9 16 2-13 14.5 26.35 18 3-20 49
Rút gọn các phân số sau: -63/72, 20/-140, 3.10/5.24, 3.7.11/22.9, 8.5-8.2/16, 11.4-11/2-13 Giúp mik với
\(\dfrac{-63}{72}=\dfrac{-7}{8}\)
\(\dfrac{20}{-140}=\dfrac{-1}{7}\)
\(\dfrac{3.10}{5.24}=\dfrac{30}{120}=\dfrac{1}{4}\)
\(\dfrac{3.7.11}{22.9}=\dfrac{231}{198}=\dfrac{7}{6}\)
\(\dfrac{8.5-8.2}{16}=\dfrac{24}{16}=\dfrac{3}{2}\)
\(\dfrac{11.4-11}{2-13}=\dfrac{33}{-11}=-3\)
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