1.3:2 3:5

2.3.4 = 9:12 =18 ÷ 24 =1612 part = 0.75 (fill in decimals).

3.64

Multiply by 3

5. The simplest ratio: 0.625: 0.5 ratio: 1 in 4.

6.65438+6/03 65438+7/03

7. 1:20 1:2 1

8.65438+5/03 65438+8/03

9.3:5 5:8

10.3:2 3:2 4:9

1 1.30

12.200g

Second, multiple choice questions

1.A 2。 C 3。 B 4。 C 5。 C

Verb (abbreviation of verb) application problem

1.3+4=7 2.35÷7=5 (vehicle)

Male: 1 120×7 = 480 (yuan) -* * *: 5× 5+36 = 70 (vehicle)

Female student: 1 120× 4/7 = 640 (yuan)

3. (1): 30× 5000 ÷1000 =1.5 (kg) (2): 60× 1 = 2 (g)

4.48÷2=24 (cm) 5. 3+4+5= 12

7+5= 12 Wang: 72× 12 3= 18 (yuan)

Length: 24× 65438+7/02 = 14 (cm) Zhang Jia: 72× 65438+4/02 = 24 (yuan)

Width: 24× 65438+5/02 = 10 (cm) Li: 72× 65438+5/02 = 30 (yuan)

Area: 10× 14= 140 (square centimeter)

6.405 ÷ 4.5 = 90km

5+4=9

Bus: 90× 5/9 = 50km.

Truck: 90× 4/9 = 40km.

I hope I can help you. You can call me if you need anything. QQ is 1820564434.