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câu b trần nhật quỳnh tính sai rồi. Nhân chia trước cộng trừ sau mà
4\(\frac{1}{2}\)+\(\frac{1}{2}\): 5\(\frac{1}{2}\)
=\(\frac{9}{2}\)\(+\)\(\frac{1}{2}\)\(\div\)\(\frac{11}{2}\)
=\(\frac{9}{2}\)\(+\)\(\frac{1}{2}\)\(\times\)\(\frac{2}{11}\)
=\(\frac{9}{2}\)\(+\)\(\frac{1}{11}\)
=\(\frac{101}{22}\)
\(3\frac{1}{2}=\frac{7}{2};4\frac{5}{7}=\frac{33}{7};5\frac{5}{14}=\frac{75}{14}\)
\(3\frac{1}{2}+4\frac{5}{7}-5\frac{5}{14}\)
\(=\frac{7}{2}+\frac{33}{7}-\frac{75}{14}\)
\(=\frac{49}{14}+\frac{66}{14}-\frac{75}{14}\)
\(=\frac{115}{14}-\frac{75}{14}\)
\(=\frac{40}{14}=\frac{20}{7}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
+) = \(\frac{20}{7}\)
+) = \(\frac{101}{22}\)
tk mik nha
mik khỏi chép lại đề
+) = \(\frac{7}{2}+\frac{33}{7}-\frac{75}{14}\)
= \(\frac{49}{14}+\frac{66}{14}-\frac{75}{14}\)
= \(\frac{115}{14}-\frac{75}{14}\)
= \(\frac{20}{7}\)
+) = \(\frac{9}{2}+\frac{1}{2}:\frac{11}{2}\)
= \(\frac{9}{2}+\frac{1}{2}\)x \(\frac{2}{11}\)
= \(\frac{9}{2}+\frac{1}{11}\)
= \(\frac{99}{22}+\frac{2}{22}\)
= \(\frac{101}{22}\)
tk nha b
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\(\frac{4.5.6}{14.15.16}\)=\(\frac{1.1.3}{7.3.4}\)=\(\frac{1.1.1}{7.1.4}\)=\(\frac{1}{28}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(3\frac{1}{2}=\frac{7}{2};4\frac{5}{7}=\frac{33}{7}\)
\(3\frac{1}{2}+4\frac{5}{7}-\frac{5}{14}\)
\(=\frac{7}{2}+\frac{33}{7}-\frac{5}{14}\)
\(=\frac{49}{14}+\frac{66}{14}-\frac{5}{14}\)
\(=\frac{115}{14}-\frac{5}{14}\)
\(=\frac{110}{14}=\frac{55}{7}\)
3\(\frac{1}{2}\)+4\(\frac{5}{7}\)- 5\(\frac{5}{14}\)=
=\(\frac{7}{2}\)+\(\frac{33}{7}\)-\(\frac{65}{14}\)
=\(\frac{49}{14}\)+\(\frac{66}{14}\)-\(\frac{65}{14}\)
=\(\frac{50}{14}\)