There is a ton of coal in a factory. Two thirds of it is used and four fifths of it is left. How many tons of coal is there

There is a ton of coal in a factory. Two thirds of it is used and four fifths of it is left. How many tons of coal is there

2 / 3 + 4 / 5 = 10 / 15 + 12 / 15 = 22 / 15 tons

There are four fifths of a ton of coal. One tenth of a ton is used for the first time, and () tons are left. Two seventh of a ton is used for the second time, and () tons are used for the second time, and () tons are left
Please fill in the blanks!

(7 / 10)
(one fifth)
(half)

A pile of 45 tons of coal, 120 tons a day, how many tons in 10 days?

45 × (120 × 10), = 45 × 12, = 25 tons; a: a total of 25 tons are used in 10 days

There's 910 tons of coal, 110 of it at a time______ It can't be finished until next time

1 △ 110 = 10 (Times); answer: 10 times to complete