一、判断题(正确的打“√”，错误的打“×”)。
1. 两个数的商是 1.3,如果被除数乘以 5,除数除以 5,那么商仍是 1.3。( )
2. 含有未知数的等式是方程。( )

1.× 2.√

二、填“＞”“=”或“＜”。
8.5÷1〇1×8.5 9.3÷1.02〇1.02×9.3
0.72÷8〇8×0.72 0.36÷0.4〇0.4×0.36
94÷0.25〇94÷2.5

1. = 2. ＜ 3. ＜ 4. ＞ 5. ＞

三、选择题(把正确答案的编号填入括号内)。
有一组不同的数,它们的平均数一定( )。
A. 与中间的一个数相等
B. 比最大的数大
C. 比最小的数小
D. 比最大的数小,比最小的数大

D

四、一箱铜棒 12 根,每根长 10 分米,宽 0.5 分米,高 0.5 分米,已知每立方分米铜重 8.9 千克,这箱铜棒重多少千克?

【解析】：首先根据长方体体积公式$V = a\times b\times h$（其中$a$为长，$b$为宽，$h$为高），计算出每根铜棒的体积，每根铜棒长$10$分米，宽$0.5$分米，高$0.5$分米，那么每根铜棒体积为$10\times0.5\times0.5 = 2.5$立方分米。一箱有$12$根铜棒，则这箱铜棒总体积为$2.5\times12 = 30$立方分米。已知每立方分米铜重$8.9$千克，用总体积乘以每立方分米铜的重量，可得这箱铜棒重$30\times8.9 = 267$千克。
【答案】：267

阅读短文并回答下列问题。Read and answer the questions.
Hello, I am John. I am in Class Two, Grade Five. I am good at English and Chinese, so I like the English and Chinese lessons very much. I have two good friends, Kate and David.
Today is Sunday. The weather is fine. I went to Hong Kong Park with my friends. First we went to the Bird House. The birds sang happily. We can watch the birds in the Bird House, but we mustn't catch them. Then we went to the Children's Playground. It is opposite (在……对面) a snack bar. Kate and I played on the swings. David didn't play. He watched us. At noon, we were very hungry and thirsty. We bought some bread and orange juice from the snack bar for lunch. In the afternoon, we came back home.
We all felt tired and I want to go to bed early. But it's really a very happy day. I hope I can have more holidays like this.
(1) What day is it today? ________
(2) Did John and his friends go to Hong Kong Park? ________
(3) Who went with John? ________
(4) Where did they go? ________
(5) What did they have for lunch? ________

【解析】：1. 根据文中“Today is Sunday.”可知今天是周日。2. 根据文中“I went to Hong Kong Park with my friends.”可知约翰和他的朋友们去了香港公园，答案是肯定的。3. 根据文中“I have two good friends, Kate and David.”以及“I went to Hong Kong Park with my friends.”可知和约翰一起去的是凯特和大卫。4. 根据文中“First we went to the Bird House. Then we went to the Children's Playground.”可知他们去了鸟屋和儿童游乐场。5. 根据文中“We bought some bread and orange juice from the snack bar for lunch.”可知他们午餐吃了面包，喝了橙汁。
【答案】：1. Sunday 2. Yes, they did. 3. Kate and David. 4. The Bird House and the Children's Playground. 5. Some bread and orange juice.

做一做
学做雕塑
请你先欣赏右图中的雕塑,然后用橡皮泥试做一下。

【解析】：本题要求先欣赏右图中的雕塑，再用橡皮泥试做。由于没有看到右图，解题关键在于按照要求先对雕塑进行观察欣赏，分析其形状、结构、比例等特征，然后准备好橡皮泥，根据观察到的雕塑特点进行模仿制作。
【答案】：先仔细观察欣赏图中的雕塑，分析其造型特点，接着准备好橡皮泥，按照观察到的雕塑特征动手进行制作。