Beijing normal university printing plate fifth grade first volume mathematics unit 3 examination paper answer

First, do you remember? Fill it out. (65438+ 0 for the third and ninth question, the remaining 2 points, ***30 points)

1, the addition and subtraction of fractions with different denominators must be divided by the fraction with the same mother number before addition and subtraction. If the calculation result can be reduced, the quotation is () points.

2. The sum of all the simplest true fractions with denominator of 5 is ().

3. Fill in the appropriate scores in the brackets above and the appropriate decimals in the brackets below.

( ) ( ) ( )

( ) ( )

4. Distance between the two places1800m. Xiaoxiao and Tao Tao started from two places at the same time. Xiaoxiao walked 40 meters per minute, and Tao Tao walked 50 meters per minute. () Minutes later, they met.

5. There is a bag of rice, weighing 5 kilograms, divided into 9 parts on average, each part is () of this bag of rice, and each part weighs () kilograms. (Fractional representation)

The decimal units of 6 and 35 are different from those of ().

7. In a physical examination, Mr. Liu, the head teacher, asked the students to measure their height. Because there is no unified unit, the data reported by the students is like this, Min Min138 cm; ; Fangfang1.49m; Dongdong m; Of the four of them, () is the tallest and () is the shortest.

8. After the smile is converted into a decimal, the 75th decimal place is ().

9. Fill in ""or "=" in ().

1( )9 10 35 ( )49 58 ( )9 10 14 ( )0.35 ( )

Second, can you calculate? Give it a try. (***38 points)

1, calculate the following problem. (12)

12 + 13 = 47 + 25 = 89 + 34 = 35 + 56 = 67 + 12 = 34 — 58 =

12 — 13 = 56 —35 = 67 — 12 = 89 — 25 = 47 — 25 = 12 — 12 =

2, according to the classification requirements of the correct score (9 points). 67 ; ; ; ; 1 ; ; 12 ; 2 ; 1 ;

True fraction false fraction with fraction

3. Calculate the following problems, which can be simple to simple. (9 points)

12 + 89 — 14 34 — 58 + 14 1— 67 —

6. Solve the equation. (8 points)

X+89 = 1x—27 = 13 X+ 13 = 58 7X—4X = 16.8

Third, can you solve the common problems in life? (***32 points)

1 and 9:00, Xiaohong left home for school and Xiaoming left home for the supermarket. Where will they meet? Please draw a ▲ in the place where you met with a pencil (assuming they walk at the following speed and don't stop on the road). How many minutes did they meet? (8 points)

Jia Xiaoming

20m100m

60m 100m ○ School is 50m per minute.

exceed

Jia Xiaohong 80 meter stone

40 meters per minute

2. Xiao Min read a book. On the first day, he finished reading the whole book. How many minutes did he walk the next day, the next day and three days later? (6 points)

Tao Tao's room covers an area of 20.4 square meters. If you use a square floor tile with a side length of 50 cm, how many pieces do you need? (6 points)

4. Two engineering teams, Team A and Team B, built a road with a length of 2 100 meters. They started construction at both ends at the same time. Team A builds 80 meters every day, while Team B builds 60 meters every day. How many days will it take to complete this road? (6 points)

During the autumn tour of National Day Golden Week, holiday travel agency launched two preferential schemes, A and B, for one-day tour.

Scheme A: 40 yuan for children and 80 yuan for adults. Scheme B: There are more than 5 people in the group (including 5 people), each of whom is 50 yuan.

What plan should three adults take with four children? What's your reason? (6 points)

Reference answer to the examination paper of Unit 3 of the Mathematics Department of Grade Five in primary school.

First, do you remember? Fill it out.

1, generally; Minimalism 2, 2, 3,; 0.5 ; 0.65 ; ; 1 4、20 5、 ;

6, 0.3 7, lily; Min Min 8,29, >, >,

Third, can you solve the common problems in life?

1、

Jia Xiaoming

20m100m

60m ▲ 100m ○ School 50m per minute.

exceed

Jia Xiaohong 80 meter stone