Answer on page 68:

1. Calculate the following question as simply as possible.

5/7 37/48

2/3 13/9

2. About how many hectares?

12 1 4

-x( 1-)=- hectare

5 3 5

3.( 1) How many ducks are there less than chickens?

2

18000 x -= 4000 pieces.

nine

(2) How many ducks are there?

1800-4000=4000?

Page 69:

1.

( 1) 4 30

(2) 2 120

2. What is the unit price of toy train and toy car?

3x+6x=405

x=405÷9

X=45 yuan

6x=45x6=270 yuan.

3. What is the unit price of potato chips and chocolate?

9 1- 15x3=46 yuan

15+8=23 yuan

46÷23=2 yuan

2+3=5 yuan

4. What are the front and back fares?

700-5x20=600 yuan

20+20=40 sheets

600÷40= 15 yuan

15+5=20 yuan

20 yuan in the front row and 15 yuan in the back row.

Hope to adopt! ! ! ! ! ! ! ! ! !