Class? Name? Student number?

I. Calculation

1. Write the number directly.

37.3÷ 10=? 5.4÷0.2=? 0.0 12÷0.4= 0.4+0.6×0.6=

4.7- 1.0 1= 0.205+3.95= 0.64+0.064=? 1. 1-0.7÷ 10=

2. Vertical calculation

5.46×0.28 ? 5.32÷ 1.7 ? 8÷3

(Keep two decimal places) (Round to ten places)

3. Solve the equation

7.8-3x = 0.6 1.8(4.7+x)= 19.8 18x- 12x+3.6 = 15

4. Recursive equation calculation (can be very simple)

1.26÷0.25×4? ( 17.8+23. 17)+(37.83+ 12.2)

4.25×2.8+7.2×4.25? [( 10+9.744÷2.4)×0.5- 1.66]÷ 17.9

1.25×2.5×4.8 ? ( 1.25+ 1.25×2+ 1.25)×2.5×8

6. Formula calculation

1)0.4 divided by 20, the quotient is 0.9 2)0.8 divided by 1 plus 18.5, and is.

What is the sum of the products of 1.2? ? How much/how much?

Two. concept

1. Fill in the blanks

1)5 hours and 9 minutes = () hours? 6.078 tons = (? ) tons (? )kg

2)0.95÷0.8, when the quotient is 1. 1, the remainder is (? )。

3) The rounding method is used to get 2.70 with three decimal places, and its range is (? ) and (? ).

4) Comparison size:

7. 1× 1.5(? )7. 1? 46.93×0.99( ? )46.92

0.23(? )0.233 ? 1.8×0.5(? ) 1.8÷0.5

9 meters and 60 centimeters (? ) 9.06m 4.97÷0. 1 (? )4.97× 10

8.5×a(？ ) 8.5÷a(a is a pure decimal)

5) Each ballpoint pen is M yuan, and each pencil is 3 yuan. Xiaodingding bought four ballpoint pens and two pencils with 50 yuan, and used (? ) Yuan, use (? ) yuan.

6) An instrumental competition will be graded by five judges. When grading, remove a highest score and a lowest score, and then calculate the average score as the final score of the player. This is an athlete's report card. Please work out the score of referee No.5 for him.

Judge 1

Judge 2

Judge 3

Judge 4

Judge 5

Final score

79

84

80

86

82

7) As the saying goes, "Walk a hundred steps after a meal and live to ninety-nine." The chubby grandfather has a stride of about 0.7 meters. He walks twice a day, each time 100 steps. You can walk () meters a year like this. (365 days a year)

judge

1) to find the average of 352,345,354,348,355,358,349,347, you can use:

350+(2-5+4-2+5+8- 1-3) ÷ 8 to answer. ( )

2) After moving the decimal point of a number (greater than 0) to the right by two places, it is 99 times higher than the original number. ( )

select

1) Four looms weave 67.2m in 3 hours. According to this calculation, it takes () hours for five identical looms to weave134.4m cloth.

A.67.2÷3÷4×( 134.4÷5)

c . 134.4÷5÷(67.2÷3÷4)d . 134.4÷5÷67.2÷3÷4

2) In the following numbers, () is a pure cyclic decimal.

A.0.033……？ B.0. 18282…… C.3.06？ D.4.045

Three. practical problem

1. Teacher Zhang took money from 50 yuan to buy stationery. After she bought three identical pens, she still had 24.8 yuan left. How much is each pen?

2. A factory originally planned to produce 126 machines every day, and complete the task in 16 days. In fact, it produces 18 more machines every day than originally planned, and actually completes the task several days ahead of schedule.

3. The distance between the two cities is 255 kilometers. Two cars, A and B, start from the two cities at the same time and drive in opposite directions. The speed of car A is 42 kilometers per hour, and the distance between the two cars after 3 hours is 12 kilometers. Find the speed of car B.

The distance between 4. AB The distance between the two cities is 300 kilometers. The local train goes from a to b, 42 kilometers per hour. Two hours later, the express train runs from B to A at a speed of 58 kilometers per hour. Two cars meet in a few hours.

5. In a unit test, there are 24 boys in Class 5 (1), with an average score of 80 points; There are 25 girls with an average score of 84. What is the average score of Class Five (1) in this exam? (The result is accurate to 0. 1)

4. use your head:

1. It takes 15 hours for a ship to go back and forth between two ports with a distance of 180 kilometers, and 15 hours for a ship to go upstream. Because the current speed increases after the rainstorm, it only takes 9 hours for the ship to sail downstream, so how many hours does it take to sail upstream?

Three students went for an outing. They bought eight loaves for lunch and shared them equally. When buying bread again,

A bought five loaves and B bought three loaves. After eating, C calculated, takeaway.

2 yuan should pay 40 cents, so how much should Party A and Party B get back?

Answer on Saturday:

1. The speed of the ship in still water is: (180 ÷10+180 ÷15) ÷ 2 =15 (km/h

Before the rainstorm, the current velocity is: (180 ÷10-180 ÷15) ÷ 2 = 3 (km/h).

After the rainstorm, the water velocity is: 180 ÷9- 15=5 (km/h).

After the rainstorm, the time required for the ship to go upstream is:180 ÷ (15-5) =18 (hours).

2.c Take out the payable 2 yuan 40 cents, which means everyone has to pay 2 yuan 40 cents, which means they have to pay 8 loaves of bread.

3 2 yuan Angle, namely 2 yuan Angle x 3 = 7 yuan Angle, the price of a loaf of bread is 7 yuan Angle.

8 =9 angle, then A retracts: 9 angle× 5-2 yuan 4 angle = 2 yuan 1 angle, and B retracts: 9 angle× 3-2.

Yuan 4 jiao =3 jiao.