The students went to plant trees. In the first group, 20 trees were planted at 30 points, and in the second group, 12 trees were planted at 18 points. Which group planted trees faster than others in the same lesson,

The students went to plant trees. In the first group, 20 trees were planted at 30 points, and in the second group, 12 trees were planted at 18 points. Which group planted trees faster than others in the same lesson,

The speed of the first group is 20 / 30 = 2 / 3 (trees / min)
The speed of the second group is 12 / 18 = 2 / 3 (trees / min)
So the planting speed of the two groups is the same

How much is 1000 plus 20 plus 1000 plus 30 plus 1000 plus 40 plus 10?
ha-ha

1000 + 40 = 1040, then 1000 = 2040, then 30 = 2070, then 20 = 2090, then 1000 = 3090, then 10 = 3100, then 1000 = 4100. Therefore, 1000 + 40, then 1000, then 30, then 20, then 1000, then 10, then 1000 is 4100

How much is 1000 plus 10 plus 1000 plus 20 plus 1000 plus 30 plus 1000 plus 40
Do not use calculator, can not use pen calculation, only oral calculation, the first few correct answers can be selected oh

The answer is 4100