2. Complete a project every day 1. How many days can the whole project be completed? 1÷1/4 =1× 4 = 4 days.
3. A section of highway is 30 kilometers long. It takes 15 days for Team A to repair alone, and 15 days for Team B to repair alone. How many days does it take for both teams to repair together?
1 Existence (10+115) =1Existence (3/30+2/30) = 1 Existence.
The grain in warehouse A is two thirds less than that in warehouse B, just 60 tons less. B How many tons of grain are there in the warehouse? Where is jiacang? Warehouse B: 60÷2/3=60×3/2=90 tons, and Warehouse A: 90-60=30 tons.
5. The grain in warehouse A is two-thirds of that in warehouse B, and warehouse A is 60 tons less than warehouse B. How many tons of grain does warehouse B have? Where is jiacang?
B: 60 ÷ (1-2/3) = 60× 3 =180 tons A: 180-60= 120 tons.
There are 240 kilograms of apples in the fruit shop, and the ratio of apples to Sydney is 5:3. How many kilograms of apples and Sydney are there in the fruit shop?
240÷5/(5+3)= 240÷5/8 = 240×8/5 = 48×8 = 384kg。
7. There are 240 kilograms more apples in the fruit shop than in Sydney. The ratio of apples to Sydney is 5:3. How many kilograms of Sydney are there in the fruit shop?
240(5-3)×3 = 360 kg