六年级数学上册1单元《分数乘法》（原创题单20241209）

人教版小学数学六年级上册 第一单元《分数乘法》测试题

一、填空题（每题2分，共20分）

1. [3/4] × [2/5] = _
2. [7/8] × [4/9] = _
3. [5/6] × [3/7] = _
4. [2/3] × [5/8] = _
5. [1/2] × [7/10] = _
6. [9/10] × [2/3] = _
7. [4/5] × [5/6] = _
8. [1/3] × [3/4] = _
9. [3/5] × [5/7] = _
10. [2/7] × [7/8] = _

二、选择题（每题2分，共20分）

1. 下列计算结果正确的是：
   A. [3/4] × [2/5] = [6/9] B. [3/4] × [2/5] = [6/20] C. [3/4] × [2/5] = [3/10] D. [3/4] × [2/5] = [1/2]

2. 计算 [5/6] × [3/7] 的结果是：
   A. [15/42] B. [5/14] C. [15/21] D. [1/2]

3. 下列哪个分数乘以 [2/3] 等于 [1/2]？
   A. [3/4] B. [3/5] C. [3/6] D. [3/7]

4. [7/8] × [4/9] 的结果是：
   A. [28/72] B. [7/18] C. [28/36] D. [1/2]
5. [2/3] × [5/8] 的结果是：
   A. [10/24] B. [5/12] C. [10/16] D. [1/2]
6. [1/2] × [7/10] 的结果是：
   A. [7/20] B. [7/12] C. [7/15] D. [1/2]
7. [9/10] × [2/3] 的结果是：
   A. [18/30] B. [3/5] C. [18/20] D. [1/2]
8. [4/5] × [5/6] 的结果是：
   A. [20/30] B. [2/3] C. [20/24] D. [1/2]
9. [1/3] × [3/4] 的结果是：
   A. [3/12] B. [1/4] C. [3/7] D. [1/2]
10. [3/5] × [5/7] 的结果是：
    A. [15/35] B. [3/7] C. [15/25] D. [1/2]

三、计算题（每题5分，共30分）

1. 计算 [7/9] × [3/14]。
2. 计算 [5/12] × [8/15]。
3. 计算 [2/7] × [7/10] × [5/8]。
4. 计算 [3/8] × [4/9] × [5/6]。
5. 计算 [1/4] × [3/5] × [2/3]。
6. 计算 [5/6] × [4/5] × [3/4]。

四、应用题（每题10分，共30分）

1. 小明有 [3/4] 升牛奶，他喝掉了 [2/5] 升，还剩多少升牛奶？
2. 一块蛋糕被分成 8 份，小红吃了其中的 [3/8]，小华吃了剩下的 [2/5]，还剩多少块蛋糕？
3. 一个长方形的长是 [5/6] 米，宽是 [3/4] 米，它的面积是多少平方米？

答案

一、填空题

1. [3/4] × [2/5] = [6/20] = [3/10]
2. [7/8] × [4/9] = [28/72] = [7/18]
3. [5/6] × [3/7] = [15/42] = [5/14]
4. [2/3] × [5/8] = [10/24] = [5/12]
5. [1/2] × [7/10] = [7/20]
6. [9/10] × [2/3] = [18/30] = [3/5]
7. [4/5] × [5/6] = [20/30] = [2/3]
8. [1/3] × [3/4] = [3/12] = [1/4]
9. [3/5] × [5/7] = [15/35] = [3/7]
10. [2/7] × [7/8] = [14/56] = [1/4]

二、选择题

1. B
2. B
3. C
4. B
5. B
6. A
7. B
8. B
9. B
10. B

三、计算题

1. [7/9] × [3/14] = [21/126] = [1/6]
2. [5/12] × [8/15] = [40/180] = [2/9]
3. [2/7] × [7/10] × [5/8] = [70/560] = [1/8]
4. [3/8] × [4/9] × [5/6] = [60/432] = [5/36]
5. [1/4] × [3/5] × [2/3] = [6/60] = [1/10]
6. [5/6] × [4/5] × [3/4] = [60/120] = [1/2]

四、应用题

1. 小明还剩的牛奶：[3/4] – [2/5] = [15/20] – [8/20] = [7/20] 升
2. 剩余蛋糕的数量：8 × (1 – [3/8]) × (1 – [2/5]) = 8 × [5/8] × [3/5] = 3 块
3. 长方形的面积：[5/6] × [3/4] = [15/24] = [5/8] 平方米