One. Fill in the blanks.
1. There are () decimals in decimal 0.8, that is, () 0.l；; 0.63 has () () 0.208 has () ().
2. Write the following decimals.
Written in 7.5: () written in 13.86 () written in 0.426 ()
Step 3 fill in ">"
6 yuan ○5.8 yuan 3.07m ○3.l m 0.77○0.698.
2.80○2.8 7.008○7.07 12.5○ 1.25
4. Without changing the size, rewriting 0.9 into three decimal places is (); Rewriting 1 1 to two decimal places is ().
5. The two internal angles of the triangle are 800 and 750 respectively, and its other internal angle is ().
6. Enlarging 3.05 100 times is (), and reducing 9.32 10 times is ().
Second, multiple-choice questions, fill in the serial number of the correct answer in brackets.
1. Among the following quantities, the one that is not equal to 1.3 decimeter is ().
①0. 13m② 1.30 decimeter ③ 1.03 decimeter ④ 13cm.
2. The following three angles in each group cannot be in the same triangle ().
① 150、870、780 ② 1200、550、50 ③800、500、500 ④900、 160、 1040
3. In each group of three line segments below, the one that cannot form a triangle is ().
① 0.07m, 5cm, l decimeter ② 2cm,16cm,17cm.
③ 3cm、8cm、5cm、45m、7m、9m。
4. The internal angles of triangle are 450 degrees, 450 degrees and 900 degrees respectively. This triangle must be ().
① obtuse triangle ② acute triangle ③ isosceles right triangle
Third, write the number directly.
3.7+5.6 = 3.4-0.6 = 0.6-0.39 = 3.8+2.2 =
0.36+0.24= 0.7—0.33= 7.6—3.9= 8—2.2=
24×5= 25×4= 14×5= 12×5=
125×8= 64÷8+8= 83—8+ 12= 5×6÷3=
Fourth, calculate the following questions.
56÷8 ten 32 475 one 165÷3 125÷5 ten 35×6
(32+28)÷(32—28)(l0+ 120÷ 10)×8 80+( 146-46×2)
480-(48+48÷ 16) 130 I(89+540÷ 18)(208- 16)÷ 12+65438+
5. Use a simple method to calculate.
1.37+22+63+45 2.530-475-25 3.8×( 125×ll)
4.44×25 5.72× 125 6.64×99+64
7.4900÷25÷4 8.( 100+4)×25 9. 17×43-43×7
Sixth, solve the problem.
1. Hope Primary School has 25 squadrons, and each squadron is divided into 4 squadrons. There are 1200 young pioneers in the school. How many people are there in each team on average?
The fourth-grade students of Guo Hua Town Central Primary School help the villagers to pick peaches in their orchards. Class four (1) picked 254kg, and Class four (2) was divided into four groups, with an average of 68kg in each group. Which class has more choices? How many kilograms more?
There is a 75-meter long road in front of the kindergarten. Now we should plant magnolia flowers on both sides of the road, and every two magnolia flowers are separated by 3 meters. How many magnolias can a * * plant?
4. Apples and pears * * * weigh 2680 kilograms, apples are packed in a basket every 50 kilograms, and * * * is packed in 28 baskets. Pears are packed in a 40 kg basket. How many baskets of pears should I pack?
Mark the location of each place on the map according to the following description.
(1) The post office is located at150m northeast of the downtown square.
(2) Xinhua Bookstore is located 250 meters southeast of downtown square.
(3) ICBC is 300 meters south of the downtown square.
6. The height of grade one 1 15cm, grade two 120cm, grade three 130cm, grade four 135cm and grade five 140cm. Please make a broken line statistical chart according to the above data.