Fifty-six students from Class 6 (1) donated money to 840 yuan, accounting for seven-eighths of the donations from Class 6 (2). How much did the students in Class Six (2) donate? ?

8/7 of 640 = 560 (yuan)

Kangaroo 1 6 hour runs 8 kilometers. According to this calculation, how many hours does it take to run 36 kilometers?

65438+6/0 is wrong?

36÷8 x？ 6 = in 1 (just correct the score calculation)

Uncle Wang plans to grow cucumbers and tomatoes in a 640-square-meter plastic greenhouse. The planting area of cucumber is 3/2 of that of tomato, and how many square meters of two kinds of vegetables are planted.

The tomato area is 640x2/(2+3)=256 (square meters).

Cucumber area 640x3/(2+3)=284 (m2)