请讲解图片中的各个题目如何作答---Here is the extracted content from the image:
**Header:**
五・四学制 四年级 下册 (Fifth and Fourth Educational System, Fourth Grade, Second Semester)
**Question 9:**
9. 四(3)班举行折纸比赛, 小红每分钟折$\frac{4}{3}$个, 小刚每分钟折$\frac{3}{5}$个, 小李每分 钟折$\frac{4}{5}$个, 谁折得最快?
Written Calculation/Annotation:
$\frac{4}{3} > 1$
$\frac{3}{5} < 1$
$\frac{4}{5} < 1$
$\frac{4}{3} > \frac{4}{5} > \frac{3}{5}$
小红折得 最快 (Xiaohong folds the fastest)
**Question 10:**
10. 李老师在挑战答题测试中, 答对了 15 题, 答错了 2 题。答对的题数是 答错题数的多少倍? 答对的题数占 总题数的几分之几?
Written Calculation/Annotation:
15 ÷ 2 = 7.5
15 + 2 = 17 (题) (questions)
15 ÷ 17
**Question 11:**
Image Description:
The image shows two frogs near water. The smaller frog on the left is labeled "青蛙宝宝" (Baby Frog) and has a speech bubble saying "我捉了 30 只虫子。" (I caught 30 insects.). The larger frog on the right is labeled "青蛙妈妈" (Mother Frog) and has a speech bubble saying "我捉了 40 只虫子。" (I caught 40 insects.).
Question Stem:
(1) 青蛙宝宝捉的虫子数是青蛙妈妈的 几分之几? (What fraction of the number of insects caught by Mother Frog is the number of insects caught by Baby Frog?)
Written Calculation:
30 ÷ 40 = $\frac{30}{40} = \frac{3}{4}$
Question Stem:
(2) 青蛙妈妈捉的虫子数是青蛙宝宝的 几倍? (用带分数表示。) (How many times is the number of insects caught by Mother Frog the number of insects caught by Baby Frog? (Express using a mixed number.))
Written Calculation:
40 ÷ 30 = 1$\frac{10}{30}$ = 1$\frac{1}{3}$
**Question 12:**
12. 剪纸社团活动中, 组长把 4 张红色 卡纸平均分给 2 个人, 每人分得这 些纸的几分之几? 每人分得几张? 把 6 张黄色卡纸平均分给 3 个人, 每人分得这些纸的几分之几? 每人 分得几张?
Written Calculation:
4 ÷ 2 = $\frac{1}{2}$ (张) (sheet)
4 ÷ 2 = 2 (张) (sheets)
6 ÷ 3 = $\frac{1}{2}$ (张) (sheet) - Note: This calculation seems incorrect for the question. It should be 6/3 = 2. However, the written fraction is $\frac{1}{2}$. Let's transcribe what is written.
6 ÷ 3 = 2 (张) (sheets)
**Question 13:**
13. 根据统计图解决问题。 (Solve the problems based on the statistical chart.)
Chart Description:
Type: Bar chart
Title: 实验小学创客作品数量统计图 (Statistics Chart of Maker Works Quantity in Experimental Primary School)
X-axis: 一年级 (Grade One), 二年级 (Grade Two), 三年级 (Grade Three), 四年级 (Grade Four), 五年级 (Grade Five), 六年级 (Grade Six)
Y-axis: 数量 (件) (Quantity (pieces))
Y-axis Scale: Marked at 0, 4, 8, 12, 16.
Bars (Approximate heights based on image):
一年级 (Grade One): 3
二年级 (Grade Two): 6
三年级 (Grade Three): 8
四年级 (Grade Four): 9
五年级 (Grade Five): 10
六年级 (Grade Six): 10
Question Stem:
(1) 三年级的作品数量占全校总数量的 几分之几? (What fraction of the total number of works in the whole school is the number of works from Grade Three?)
Written Calculation/Annotation:
3 + 6 + 8 + 9 + 10 = 36 (件) (pieces) - Note: This sum excludes Grade Six.
36 ÷ 6 = $\frac{1}{6}$ - Note: This calculation does not correspond to the question asked, even using the sum 36.
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