1. "Clever calculation" is correct and clever: 35% of the class name and student number scores.

1. Numbers written directly: (5 points)

×2 = × 1 = ×= 12×= ()3=

×7= ×= 5-= ×= +×=

2. Use your favorite method to calculate: (18 points)

Be careful! !

+× ×+× +++

×× (+)×4×5 27×- 1 1

10 1×- ×48 ×34×7×

3. Formulaic calculation: (12)

How much is (1)? (2) What is the sum of the differences between sum and their products?

(3) What's the difference between and? (4) What is the product of the sum of 9 multiplied by its reciprocal?

2. Fill in "check-in": 27% (question 1 1 2, opponent 1 point)

(1) x 7 stands for (); 8× means ().

(2) hours = () minutes, kilograms = () grams.

1 m2 = () square decimeter = () decimeter

(3) The reciprocal of the smallest prime number is (), the reciprocal of 0.25 is (), and the reciprocal of is ().

(4) The number of boys in the sixth grade is the number of girls, so the number of boys accounts for the whole grade.

5] A pile of sand weighs tons, used up, used up () tons, and there is a total.

[6] Fill in ""or "=" in ○.

×××××××5m× 1m

(7) There are as many peach trees in citrus reticulata, and () is regarded as the unit "1". If there are 28 orange trees, there are () peach trees.

Being a batch of parts can be completed in 4 hours, then () hours can be completed.

⑼ ×( )=×( )=-( )=( )×0.3 = 1

At the beginning of the new semester, students should choose a squadron leader. Among the 60 people who took part in the election, Xiaoming was elected.

In favor of Xiaohong's election, in favor of Xiaodong's election, the ones with the least votes were () and () respectively.

⑾ Right: It's a pile of discs. If one of them is painted red, it needs to be painted red () disc; If you take away 4 discs and paint the rest in red, you need to paint () discs in red.

⑿ It is known that a× = b× = x c, where a, b and c are natural numbers and none of them are zero, and the three numbers A, b and c are arranged in descending order: ()