Nhân, chia hai số hữu tỉ

Nhân, chia hai số hữu tỉ

7th Grade

10 Qs

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Nhân, chia hai số hữu tỉ

Nhân, chia hai số hữu tỉ

Assessment

Quiz

Mathematics

7th Grade

Hard

Created by

Phương Nhung

Used 52+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Kết quả của phép tính

 25. 13=\frac{2}{5}.\ \frac{-1}{3}=  

 215\frac{2}{15}  

 215\frac{-2}{15}  

 18\frac{1}{8}  

 18\frac{-1}{8}  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Kết quả của phép tính

 325:6\frac{-3}{25}:6  

 1825\frac{-18}{25}  

 1825\frac{18}{25}  

 150\frac{1}{50}  

 150\frac{-1}{50}  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Số hữu tỉ 516\frac{-5}{16}  là tích của hai số hữu tỉ nào sau đây?

 52. 114\frac{-5}{2}.\ \frac{1}{14}  

 52. 18\frac{-5}{2}.\ \frac{1}{8}  

 52. 8\frac{-5}{2}.\ 8  

 52. 18\frac{-5}{2}.\ \frac{-1}{8}  

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Tìm x biết  23x=18\frac{2}{3}x=\frac{-1}{8}  

 x=14x=-\frac{1}{4}  

 x=516x=-\frac{5}{16}  

 x=316x=\frac{3}{16}  

 x=316x=-\frac{3}{16}  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Tính:  (523) : (3)=?\left(-\frac{5}{23}\right)\ :\ \left(-3\right)=?  

 569\frac{5}{69}  

 569-\frac{5}{69}  

 1523-\frac{15}{23}  

 1523\frac{15}{23}  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Tìm x,x,  biết  32x57=32\frac{3}{2}x-\frac{5}{7}=-\frac{3}{2}  

 x=1114x=-\frac{11}{14}  

 x=1121x=-\frac{11}{21}  

 x=1114x=\frac{11}{14}  

 x=1121x=\frac{11}{21}  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Với  x=abx=\frac{a}{b}   , y=cd,\ y=\frac{c}{d}  ta có  x.y=x.y=  

 x.y=adbcx.y=\frac{ad}{bc}  

 x.y=bdacx.y=\frac{bd}{ac}  

 x.y=acbdx.y=\frac{ac}{bd}  

 x.y=abbcx.y=\frac{ab}{bc}  

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