1.6E:练习
- Page ID
- 205070
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查找等效分数
在以下练习中,找到等同于给定分数的三个分数。 用数字或代数展示你的作品。
\(\dfrac{3}{8}\)
- 回答
-
\(\dfrac{6}{16}\),,\(\dfrac{9}{24}\)\(\dfrac{12}{32}\), 答案可能有所不同
\(\dfrac{5}{8}\)
\(\dfrac{5}{9}\)
- 回答
-
\(\dfrac{10}{18}\),,\(\dfrac{15}{27}\)\(\dfrac{20}{36}\), 答案可能有所不同
\(\dfrac{1}{8}\)
简化分数
在以下练习中,进行简化。
\(-\dfrac{40}{88}\)
- 回答
-
\(-\dfrac{5}{11}\)
\(-\dfrac{63}{99}\)
\(-\dfrac{108}{63}\)
- 回答
-
\(-\dfrac{12}{7}\)
\(-\dfrac{104}{48}\)
\(\dfrac{120}{252}\)
- 回答
-
\(\dfrac{10}{21}\)
\(\dfrac{182}{294}\)
\(-\dfrac{3x}{12y}\)
- 回答
-
\(-\dfrac{x}{4y}\)
\(-\dfrac{4x}{32y}\)
\(\dfrac{14x^{2}}{21y}\)
- 回答
-
\(\dfrac{2x^{2}}{3y}\)
\(\dfrac{24a}{32b^{2}}\)
乘以分数
在以下练习中,乘以。
\(\dfrac{3}{4}\cdot \dfrac{9}{10}\)
- 回答
-
\(\dfrac{27}{40}\)
\(\dfrac{4}{5}\cdot \dfrac{2}{7}\)
\(-\dfrac{2}{3}\cdot -\dfrac{3}{8}\)
- 回答
-
\(\dfrac{1}{4}\)
\(-\dfrac{3}{4}\left(-\dfrac{4}{9}\right)\)
\(-\dfrac{5}{9}\cdot \dfrac{3}{10}\)
- 回答
-
\(-\dfrac{1}{6}\)
\(-\dfrac{3}{8}\cdot \dfrac{4}{15}\)
\(\left(-\dfrac{14}{15}\right)\left(\dfrac{9}{20}\right)\)
- 回答
-
\(-\dfrac{21}{50}\)
\(\left(-\dfrac{9}{10}\right)\left(\dfrac{25}{33}\right)\)
\(\left(-\dfrac{63}{84}\right)\left(-\dfrac{44}{90}\right)\)
- 回答
-
\(\dfrac{11}{30}\)
\(\left(-\dfrac{63}{60}\right)\left(-\dfrac{40}{88}\right)\)
\(4\cdot \dfrac{5}{11}\)
- 回答
-
\(\dfrac{20}{11}\)
\(5\cdot \dfrac{8}{3}\)
\(\dfrac{3}{7}\cdot 21n\)
- 回答
-
9n
\(\dfrac{5}{6}\cdot 30m\)
\(-8\cdot\dfrac{17}{4}\)
- 回答
-
−34
\((-1)\left(-\dfrac{6}{7}\right)\)
除以分数
在以下练习中,除以。
\(\dfrac{3}{4}\div \dfrac{2}{3}\)
- 回答
-
\(\dfrac{9}{8}\)
\(\dfrac{4}{5}\div \dfrac{3}{4}\)
\(-\dfrac{7}{9}\div \left(-\dfrac{7}{4}\right)\)
- 回答
-
1
\(-\dfrac{5}{6}\div \left(-\dfrac{5}{6}\right)\)
\(\dfrac{3}{4}\div \dfrac{x}{11}\)
- 回答
-
\(\dfrac{33}{4x}\)
\(\dfrac{2}{5}\div \dfrac{y}{9}\)
\(\dfrac{5}{18}\div -\dfrac{15}{24}\)
- 回答
-
\(-\dfrac{4}{9}\)
\(\dfrac{7}{18}\div \left(-\dfrac{14}{27}\right)\)
\(\dfrac{8u}{15} \div \dfrac{12v}{25}\)
- 回答
-
\(\dfrac{10u}{9v}\)
\(\dfrac{12r}{25}\div \dfrac{18s}{35}\)
\(-5\div \dfrac{1}{2}\)
- 回答
-
-10
\(-3\div \dfrac{1}{4}\)
\(\dfrac{3}{4}\div (-12)\)
- 回答
-
\(\dfrac{1}{16}\)
\(-15\div -\dfrac{5}{3}\)
在以下练习中,进行简化。
\(\dfrac{-\dfrac{8}{21}}{\dfrac{12}{35}}\)
- 回答
-
\(-\dfrac{10}{9}\)
\(\dfrac{-\dfrac{9}{16}}{\dfrac{33}{40}}\)
\(\dfrac{-\dfrac{4}{5}}{2}\)
- 回答
-
\(-\dfrac{2}{5}\)
\(\dfrac{5}{\dfrac{3}{10}}\)
\(\dfrac{\dfrac{m}{3}}{\dfrac{n}{2}}\)
- 回答
-
\(\dfrac{2m}{3n}\)
\(\dfrac{-\dfrac{3}{8}}{-\dfrac{y}{12}}\)
简化使用分数条编写的表达式
在以下练习中,进行简化。
\(\dfrac{22 + 3}{10}\)
- 回答
-
\(\dfrac{5}{2}\)
\(\dfrac{19 - 4}{6}\)
\(\dfrac{48}{24 - 15}\)
- 回答
-
\(\dfrac{16}{3}\)
\(\dfrac{46}{4 + 4}\)
\(\dfrac{-6 + 6}{8 + 4}\)
- 回答
-
0
\(\dfrac{-6 + 3}{17 - 8}\)
\(\dfrac{4\cdot 3}{6\cdot 6}\)
- 回答
-
\(\dfrac{1}{3}\)
\(\dfrac{6\cdot 6}{9\cdot 2}\)
\(\dfrac{4^{2} - 1}{25}\)
- 回答
-
\(\dfrac{3}{5}\)
\(\dfrac{7^{2} + 1}{60}\)
\(\dfrac{8\cdot 3 + 2\cdot 9}{14 + 3}\)
- 回答
-
\(2\dfrac{8}{17}\)
\(\dfrac{9\cdot 6 - 4\cdot 7}{22 + 3}\)
\(\dfrac{5\cdot 6 - 3\cdot 4}{4\cdot 5 -2\cdot 3}\)
- 回答
-
\(\dfrac{9}{7}\)
\(\dfrac{8\cdot 9 - 7\cdot 6}{5\cdot 6 - 9\cdot 2}\)
\(\dfrac{5^{2} - 3^{2}}{3 - 5}\)
- 回答
-
\(-8\)
\(\dfrac{6^{2} - 4^{2}}{4 - 6}\)
\(\dfrac{7\cdot 4 - 2(8 - 5)}{9\cdot 3 - 3\cdot 5}\)
- 回答
-
\(\dfrac{11}{6}\)
\(\dfrac{9\cdot 7 - 3(12- 8)}{8\cdot 7- 6\cdot 6}\)
\(\dfrac{9(8-2)-3(15-7)}{6(7-1) - 3(17-9)}\)
- 回答
-
\(\dfrac{5}{2}\)
\(\dfrac{8(9-2) - 4(14 - 9)}{7(8-3)-3(16 -9)}\)
将短语翻译成带分数的表达式
在以下练习中,将每个英语短语翻译成代数表达式。
\(r\)和的商和之\(s\)和\(10\)
- 回答
-
\(\dfrac{r}{s + 10}\)
\(A\)和 and 的商\(3\)和差\(B\)
and 之差的商\(y\),\(x\)以及\(−3\)
- 回答
-
\(\dfrac{x - y}{-3}\)
and 之\(m\)和的商\(n\),以及\(4q\)
日常数学
烘烤。 巧克力曲奇的食谱需要一\(\frac{3}{4}\)杯红糖。 伊梅尔达想把食谱加倍。
- 伊梅尔达需要多少红糖? 显示您的计算结果。
- 量杯通常以\(\frac{1}{4}\)、\(\frac{1}{3}\)\(\frac{1}{2}\)、和\(1\)杯子为一组。 画一张图,展示伊梅尔达可以用两种不同的方法来测量将饼干配方翻倍所需的红糖。
- 回答
-
- \(1\frac{1}{2}\)杯子
- 答案会有所不同
烘烤。 Nina 正在制作 4 盘软糖,供音乐演奏会结束后食用。 每个平底锅她都需要一\(\frac{2}{3}\)杯炼乳。
- 妮娜需要多少炼乳? 显示您的计算结果。
- 量杯通常以\(\frac{1}{4}\)、\(\frac{1}{3}\)\(\frac{1}{2}\)、和\(1\)杯子为一组。 画一张图,显示 Nina 可以用两种不同的方法来测量一\(4\)锅软糖所需的炼乳。
P@@ ar tions Don 购买了一包重达\(5\)磅的散装糖果。 他想把糖装在装\(\frac{1}{4}\)磅的小袋子里卖掉。 他能从散装包装中装多少小袋糖果?
- 回答
-
\(20\)袋子
Partions Kristen 有@@ 几\(\frac{3}{4}\)码的丝带,她想把它们剪成\(6\)相等的部分,为女儿的\(6\)洋娃娃做发带。 每个娃娃的发带会有多长?
写作练习
拉斐尔想在餐厅点半个中等大小的披萨。 服务员告诉他,中等大小的披萨可以切成\(6\)或切成\(8\)薄片。 他更喜欢\(3\)切\(6\)片还是\(4\)切成\(8\)薄片? 拉斐尔回答说,既然他不是很饿,他更喜欢\(3\)切成\(6\)薄片。 解释拉斐尔的推理有什么问题。
- 回答
-
答案可能有所不同
举一个日常生活中的例子,说明\(\dfrac{1}{2}\cdot \dfrac{2}{3}\)情况如何\(\dfrac{1}{3}\)。
解释如何找到分数的倒数。
- 回答
-
答案可能有所不同
解释如何找到负数的倒数。
自检
ⓐ 完成练习后,使用这份清单来评估你对本节目标的掌握程度。

ⓑ 看完清单后,你认为你为下一节做好了充分的准备吗? 为什么或者为什么不呢?


