10 years 3÷20 = 200 years 3.
3/4 of 9 =12
5×4 of 81= 5 of 32.
165438+6 inches 0× 65438+5 inches 02 = 5 inches 22
5-6 of 91=18 of 7.
2/3/4/7 = 7/6.
8+0+3 of 65438, 4 = 7 of 8.
Five-sixths ÷ five-sevenths = seven-sixths.
2. Simplify first, then compare (writing process)
2 1: 49 = 3: 7 (about 7) = 3/7.
1.6 ∶ 2.4 = 8: 12 = 2: 3 = 2/3
2.4 into 8 = 12 into 40 = 65438+3 into 00.
2 of 3:9 of 7 = (3 of 7× 63): (2 of 9× 63) = 27:14 =14 of 27.
The following questions should be calculated as simply as possible.
9 of 7-8 of 65438+09-9 of 65438+0 of 65438.
= 7 choose 9-( 19 choose 8+ 19 choose 1)
= 9+0 in 7-65438
= 2 out of 7
65438+5/02+8/8 1 × 65438+7/02
= 1.2 5×8 1+8 1× 65438+7.02.
=1× 8 (5+of12/7 of kloc-0/2)
= 1× 1 in 8。
= 0 in 65438+8.
1 ÷ [ 1× 5 ( 1+3/4)]
= 1 ÷ 2 ( 1 × 5).
= 1÷4+0 in 2。
=2
4. Solve the equation
6x-2.4=0.36
6x=0.36+2.4
6x=2.76
x=0.46
5x÷ 15= 15
5x= 15× 15
5x=225
x=45
8x-0.5x=30
7.5x=30
x=4
A chicken farm has 2 100 hens, 4 times more than cocks. How many cocks are there? (Equation solving)
Suppose there are x cocks.
4x+ 100=2 100
4x=2 100- 100
4x=2000
x=500
There are 500 cocks.
6. The price of a badminton racket is 120 yuan. Dad bought two pairs of badminton rackets, five badminton rackets, and one used 280 yuan. How much is a badminton? (Equation solving)
Solve a badminton x yuan
2 120+5x=280
5x+240=280
5x=280-240
5x=40
x=8
Answer a badminton 8 yuan.
7. put ">" or "
15× 3/5 (
15 ÷ 3/5 (> ) 15 3/4 2 (
8. Calculate the following questions (write down the calculation process)
65438+3/00/9/8× 5/27.
= 65438+3×8×9×5×27 00 or more.
= 65438+ 1 divided into 6 parts.
3/5 (3/4-2/3)/6/5
= 3/5+65438/02+0 × 5/6.
= 3 × 12 × 5 × 6 in 5。
=6
6/8 [(2/ 1+3/ 1) × 65438+3/00]
= 6/8 (5/6× 65438+3/00)
= 3/4/4 1
3×4 of = 4
=3
9.( 1) There are 50 poplars and 40 willows in the campus. How many of them are willows?
(2) There are 50 poplars in the campus, and the number of willows is 4/5 of that of poplars. How many willows are there?
(3) There are 40 willows on campus, which is 4/5 of that of poplars. How many poplars are there on campus?
4 in the solution (1)40÷50 = 5.
(2) 50× 5 4 = 40 (tree)
(3) 4 = 40×5 = 50 out of 50 (tree)
10 class. Six (1) arrived at school today, and two of them asked for leave to attend class 6 today (1).
Total number of students: 48+2=50 (persons)
Attendance: 48 ÷ 50×100% = 0.96×100% = 96%.
1 1. Fill in the form.
The first line is 0.8751.251.8333 ... (3 cycles).
The second line is 50%, 27% and 5%.
The third line is 54% 87.5% 183.33%.
12. In a traffic knowledge contest, the players of Class 6 (1) answered 20 questions in a hurry and answered 15 questions correctly; Class 6 (2) players answer first 16 and answer correctly 14. What kind of players answer more questions correctly? Which class has a higher correct answer rate?
The correct rate of solving six categories (1):15 ÷ 20×100% = 0.75×100% = 75%.
The correct rate of 6 (2) class:14 ÷16×100% = 0.875×100% = 87.5%.
Class 6 answers more questions correctly (1), and Class 6 (2) answers more correctly.