# Junior 2 # Elementary Mathematics can train your thinking ability and way of thinking. Of course, the most important thing is that you can live in society. Looking for a good job is basically related to mathematics. So it is necessary to learn from an early age. The following is the "error-prone type of mathematics in the second grade of primary school", I hope it will help you.

Multiple choice questions 1. In the following formula, () means 9 4 plus a, 9+9+9+9.

9+4

4×9

At 2.3: 30, the angle formed by the hour hand and the minute hand is ().

First, the right angle

B, obtuse angle

C, acute angle

3, 8+8+8+7 rewritten as multiplication formula is ()

a、3×7+8

b、4×8- 1

c、8×3- 1

4, in 4, 6, 9 three numbers, arbitrarily choose two numbers sum, get the number () possibilities?

A, 6

b、5

c、3

5, four good friends meet and hug each other once, * * * to hug () times.

Answer: 3 times.

B, 6 times

C, 4 times

6. On the clock face, the hour hand moves from 1 to 3, and the minute hand moves to ()

A, 2 grids

B, three laps

C, 2 laps

7. In the handicraft class, boys made six red flags and girls made 10 red flags. What can be done to make boys and girls make as many colorful flags?

A, girls give boys four faces

B, boys add two faces

C, girls give boys 2 noodles

8, with 2, 0, 6, you can form () ten digits and two different digits.

A, 6

b、3

c、4

9, the following formula can't be changed to 7 x 2 is ()

2+2+2+2+2+2+2+2

7+7+2

Seven plus seven

What is the product of 10 and two 3s? The formula is ()

a、2×3

2+3

c、3×3

fill-in-the-blank question

1, 7×5= (), pronounced as (), the formula used is () 2, 63 is greater than 36 (), () is less than 56 times 9, and () is less than 45 times 8.

3. 6×6 means () () addition, and 6+6 means () () addition.

6×2 means that () has been added.

4. How many can I put in brackets?

8×()()×6

()×5