Fill in the blanks (fill in the appropriate formula in brackets) (every blank 1 ***8).
1, the road team built 2.4 kilometers of roads in x days, with an average of () kilometers per day.
2. Xiaoming has a stamp, three less than Xiaohua, and Xiaohua has a stamp ().
3. If the unit price per kilogram of apples is A yuan, it will cost () yuan to buy B kilograms.
4. Class 5 (1) has student A. Today, three students are on leave, and today () is on duty.
5, a willow, 50 more than poplar, poplar ().
6. There are X pear trees in the orchard, and the number of apple trees is twice that of pear trees. 10. There are () apple trees in the orchard.
7. The price of a football is 7 times less than that of a ball, 1.4 yuan, a ball is X yuan. A football () yuan.
8. Use S to represent the area of triangle, A and H represent the bottom and height respectively, and the formula for calculating the area of triangle is ().
2. True or false questions (tick "√" correctly, and "×" wrongly) (65438+0 points for each small question ***5 points).
1, a2 and aqa both represent the multiplication of two A's. ( )
2. "less than 2 times of x" is 2.“x-2 in the formula containing letters. ( )
3, the equation is not necessarily an equation, the equation must be an equation. ( )
4. The value of the unknown that makes the left and right sides of the equation equal is called the solution of the equation. ( )
5,4x+5x8 = 72, the solution of this equation is 28. ( )
3. Choose the correct answer and put the serial number in brackets (65438+ 0 for each small question ***5).
1, in the following formula, () is an equation.
a、25x B、 15-3= 12 C、6x+ 1=6 D、4x+7