Class name grade

I. Fill in the blanks (22 points)

1, 5.3 hours = () hours () minutes 6 meters 50 centimeters = () meters = () centimeters.

5 hectares and 30 square meters = () hectares

2. Given 376× 15 = 5640, 3.76× 1.5 = (), 56.4 ÷ 1.5 = ().

The approximate value of one thousandth of the quotient of 3.2.7÷ 1 1 is ().

4, 4.5 is 9 times that of (), and 9 times that of 4.5 is ().

5. The base of parallelogram is 2.8 meters, the height is 0.5 meters, and the area of triangle with the same height as the base is () square meters.

6. Fill in "

4,200 square meters, 4.2 hectares, 7.08 kilograms, 7 kilograms and 80 grams

2.05× 1.03 2.05 9. 12÷ 1.24 9. 12

7, an isosceles triangle, the top angle is 75 degrees, the bottom angle is degrees.

8. It takes 3.6 minutes to saw a piece of wood into 3 sections and () minutes to saw it into 8 sections.

9. The circumference of a square is 5.6 decimeters, and the area of this square is () square decimeters.

10, and the sum of a and b is 12. 1. If the decimal point of A is shifted one place to the left, it is equal to B, where B is () and A is ().

1 1, a number is added, subtracted and divided with itself, and its sum, difference and quotient add up to 8.6, and this number is ().

12, 64.9 minus () 6.49 to get 6.49.

Second, the judgment (6 points)

1, 0.7kg cotton is lighter than 700g iron. ( )

2. The area and circumference of a square with a side length of 0.4 decimeter are equal. ( )

3. There are only 9 decimal places greater than 0.4 and less than 0.5. ( )

4.7.983 The result after retaining one decimal place is 8. ( )

5, 19.325 The 80th digit after the decimal point is 2. ( )

6. Dividing a number by 0.0 1 is equivalent to enlarging this number by 100 times. ( )

Third, the choice (6 points)

1 has a right triangle with three sides of 0.3 decimeter, 0.5 decimeter and 0.4 decimeter respectively, and the area of this triangle is () square decimeter.

a、0. 12 B、0.075 C、0.06 D、0. 15

2, a shirt should use 6 buttons, 100 buttons can nail at most () shirts.

a、 15 B、 16 C、 17 D、 18

3. if a × 2.8 = b × 3.9 (the number of a is not equal to 0), then a () b.

A is greater than b and less than c, equal to

4. Xiao Hu has to walk 1.3 km from home to school in the morning. After walking 0.3 km, I found that I didn't bring my math exercise book, so I went home to get it. In this way, he walked () kilometers to school than usual.

a、 1 B、 1.6 C、0.6 D、0.3

5. In a subtraction formula, the sum of the minuend, subtraction and difference is 9.68, the difference is 3.2, and the subtraction is ().

a、6.48 B、 1.64 C、3.28 D、3.025

6. Calculate 1.68÷0. 15. When the quotient is 1 1, the remainder is ().

a、0.3 B、3 C、0.03 D、30

Four, calculation (36 points)

1, write directly. (8 points)

= 2-0.64-0.36= 1- = 0.25×4÷0.25×4=

6.3+7= 1.25×3.3×0= 2. 19+9. 1= 37.2×99+37.2=

2, column vertical calculation (4 points)

8.32×2.5 7.45÷3.8 (quotient with two decimal places)

2, text questions (6 points)

(1) The number A is 2.89, which is 0.7 1 less than the number B. What is the number B?

(2) What is the quotient of the sum of 3.5 and 1.5 divided by their difference?

3. Using recursive equation calculation can simplify writing a simple calculation program. (18)

2.5×(6+9.728÷3.2) 35.6- 1.8+4.4-7.2 0.25×3.2× 12.5

7.5÷( 1.5+2.5) 6.9÷[(0.4+0.5)×0.6] 13.7×0.25-3.7÷4

Five, the application problem (30 points)

1. Grandma Zhang bought 6.5kg of beans at the food market, paid them to 20 yuan, and took them back to 1.8 yuan. How much is it per kilogram of beans?

2. Students in two classes of Grade Six collect tree species. A class of 45 people, each collecting 0.13 kg; 36 people in Class Two collected 6.15 kg; How many kilograms of tree species did Class Two collect?

3. Four giant pandas ate169.6438+02kg of bamboo leaves in two weeks. How many kilograms of bamboo leaves does each giant panda eat every day?

4. Clothing factory produces school uniforms. Now every 2 meters of cloth is used, which is 0.2 meters less than the original. How many sets of cloth can 880 school uniforms make now?

A bucket of water weighs 9.2 kilograms. Half poured, the bucket weighs 5.6 kilograms. How much does this bucket weigh?

6. Mingming's new room will be bricked up. If you use a square brick with an area of 0.09 square meters, you need 160. If you use a square brick with a side length of 0.4 decimeter, how many pieces do you need?