=0.4×4

= 1.6

2.(0.78+0.65)÷0. 13

=0.78÷0. 13+0.65÷0. 13

=6+5

= 1 1

3. The bus travels 60 km 1.5 hours, and the speed of the van is 1.25 times that of the bus. How many kilometers does this truck travel per hour?

Bus 1.5 hour journey 60 kilometers

The speed of the bus is 60÷ 1.5=40 (km/h).

The speed of the van is 1.25 times that of the bus.

The speed of the van is 40× 1.25=50 (km/h).

4. A kind of wheat, 20.5 kg of grindable flour 16.4 kg. How many kilograms of grindable flour is there per kilogram of wheat? How much wheat does it take to grind a kilogram of flour?

Solution:

Wheat milling per kilogram: 16.4÷20.5=0.8 (kg)

Grinding one kilogram of flour requires: 20.5÷ 16.4= 1.25 (kg).

5. Zhang Ming bought 3 kilograms of oranges and 2 kilograms of apples, and spent 13.5 yuan. Li Chao bought 3 kilograms of oranges and 5 kilograms of apples, and spent 22.5 yuan. How much are apples and oranges per kilogram?

Solution:

∫3 kg of oranges and 2 kg of apples * * * spent 13.5 yuan.

3 kilograms of oranges, 5 kilograms of apples, 22.5 yuan.

∴3 kg of apples * * * used 22.5— 13.5=9 (yuan).

Therefore, 1 kg apple needs 9÷3=3 yuan.

65438+ 0 kg of oranges (13.5-2×3)÷3=2.5 yuan.

Welcome to ask questions to the team of math enthusiasts. If not, you can ask me again. I hope it can be adopted. O(∩_∩)O Thank you!