Unit 4 Test (Volume B)
Fill in the blanks.
1, and the formula for calculating the perimeter of a rectangle is expressed in letters as ().
2. Li Shifu makes m parts a day, 8 more than Master Zhang, and two people make * * * pieces a day ().
3. X copies of each exercise book. I bought 6 copies and handed them in to 10 yuan, so I should get back () yuan.
4. The number of A is a times that of B, and the number of A is () times that of B 。
5. () is called an equation.
6. The difference between number A and number B is 14, the sum of the two numbers is 108, number A is () and number B is ().
7.A× (7+b), when A = 5, b= () can make A× (7+b) = 52.5.
8. The circumference of a square is one centimeter, and the formula for expressing its area by letters is (). When a = 24, the square area should be () square centimeters.
Second, connect the left and right sides with a straight line.
A times a+2b.
A and add a2
2 times of 2A +3A
Half of a 2a
The number a+a that is twice larger than a times 3.
Twice the sum of a and b
Sum of 2 times of A and B (A+B) × 2
Three. Judgment (tick "√" for the right and "×" for the wrong)
(1), the equation is the equation. ()
(2)、42=4×2 ( )
(3) The solutions of 4x-20 = 4 and 50-5x = 20 are the same. ()
(4) Guangming Store sells A refrigerators in the morning, B refrigerators in the afternoon and ab refrigerators on this day. ()
(5)、2.5a+b=2.5ab()
(6)、2b×(b+c)=2b2+2c()
Four, choose (fill in the serial number)
Divide the quotient of 1 and a by 150 and subtract the difference of 20. The formula is ().
①、a \u 150-20②、 150 \u a-20
③、a( 150-20)④、 150(a-20)
2. The equation in the following formula is ().
①、x+3 ②、3+ 15= 18 ③、4a+27=78 ④、4x- 15