5/6 1/2 2/3 0 7/ 10 13/ 14

Fill in the blanks.

1. 12, 10, 20 , 0.4

2. Rounding, 67.5 1

3. Radius

Third, the judge.

1.×

2.√

3.√

4.√

Fourth, find the area of the line in the figure.

1.6× 3-3.14× 9 ÷ 2 = 3.87 (square centimeter)

2.20× 20+3.14×100 ÷ 2 = 557 (square centimeter)

Fifth, solve the problem.

1. Solution:1-1/7-2/5 =16/35.

A: Rice accounts for 16/35.

2. Solution: (8- 1.72)÷2=3. 14 (decimeter)

3. 14×(3. 14÷3. 14÷2)? =0.785 (square decimeter)

A: The cross section of the stump is 0.785 square decimeter.

Exercise the brain.

Answer: 39/41> 78/85 >6/7 > 13/ 18

Note: Category 5/6 on this page refers to 5/6.