Four tons of coal transported from canteen is planned to be burned for five months. The number of coal burned per month is expressed as () tons in fractions, () tons in decimals, and () kg in integers. The number of coal burned per month is one ton (& nbsp; & nbsp;), which is & nbsp; & nbsp;) (& nbsp; & nbsp;) (& nbsp;)

Four tons of coal transported from canteen is planned to be burned for five months. The number of coal burned per month is expressed as () tons in fractions, () tons in decimals, and () kg in integers. The number of coal burned per month is one ton (& nbsp; & nbsp;), which is & nbsp; & nbsp;) (& nbsp; & nbsp;) (& nbsp;)

Monthly burning: 4 ／ 5 = 45 (tons); 45 tons = 0.8 tons = 800 kg; 45 tons accounting for 1 ton: 45 ／ 1 = 45; accounting for 4 tons: 45 ／ 4 = 15. So the answer is: 45, 0.8800, 45, 15

The difference between a and B is 30, where 310 of a is equal to 13 of B, then the sum of the two numbers is______ ．

Let a be x, then B be 910x, & nbsp; & nbsp; x-910x = 30, & nbsp; & nbsp; & nbsp; 110x = 30110x △ 110 = 30 △ 110, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; X = 300300 × 910 = 270300 + 270 = 570. A: the sum of these two numbers is 570, so we should fill in 570