You guys have elementary school papers, no thanks!!

The width is increased to 21 meters, and the area is 252 square meters.

We can count the length to be 252 21 12

The width was originally 7 meters, so the original area was 12 7 84 square meters.

21 * length = 252, get: length = 12 meters; Original area = 12 * 7 = 84 square meters.

1 All meet at 30 meters from the midpoint of the two places, indicating that Xiao Gang walked 60 meters more than Xiao Ming when they met, and it took 30 * 2 (80-60) = 3 (minutes) to walk 60 meters more, so the distance between the two places was (80 + 60) * 3 = 420 (meters).

Distance difference Speed difference = meeting time 30*2 80-60=3 time * speed 3*80=240m

Solution: Set up x damaged flower pots.

200-x）×

x=6A: A total of 6 pots were damaged.

If x are successfully transported and y are damaged, then there is a formula x+y=200, , and the two formulas are jointly solved, , y=6,

There are two things to keep in mind: bai

One is the division vertical du calculation, and the other is the ninety-nine multiplication zhi table can be ignored first.

DAO considered the main topic, and went back to himself to give a three-digit division for the children to calculate it vertically, and explained that they understood the vertical calculation method. Next, let's go back to the original question.

In the first question, it is known that the remainder of the penultimate row is 5, and the single digit of the penultimate two digits in the penultimate row is 1, so according to the multiplication table, multiply by 7 mantissa as 1 to get the number of the penultimate row is 21. Then the third-to-last row is 26, so you can know that the single digit of the original divisor is 6. The single digit of the penultimate row is 4, multiplied by 7 and the mantissa is 4, resulting in the tenth digit of the penultimate row being 1.

And so on, and the answer can be obtained.

Question 1: From the bottom up, the unit digit is 1, which means that the multiplication with 7 is 1 in the unit digit, and 3 7 21, so the internal digit of the quotient is 3, and then allows 21 5 26;Looking further up, the unit digit is 4, which means that multiplying with 7 is 4 in the unit digit, and 2 7 14, so the ten digits of the quotient are 2, and then 14 2 16;Then continue to look up, there is only one cell here, which means that multiplying it with 7 gives a single number, and 1 7 7, so the hundred digit of the quotient is 1, and then 7 1 8;The dividend is 866, the divisor is 7, the quotient is 123, and the remainder is 5

To sum up, the numbers in the cell from top to bottom are 1, 2, 3, 8, 6, 6, 7, 1, 6, 2, 6, 2, 2

Question 2: Looking down from above, 8 ()7 (), and 8 9 72, so the divisor is; Looking from the bottom up, 8 3 5 means that the unit digit multiplied by 9 is 5, and 5 9 45, so the unit digit of the quotient is 5, so the quotient is 8, and then 45 3 48;The dividend is 768, the divisor is 9, and the quotient is 85

To sum up, the numbers in the grid from top to bottom are 5, 9, 7, 6, 8, 2, 4, 4, 5

In the first question, the three numbers on the first line are 1 9

In the number of source 1 9 and 7 multiplied by the single digit there is 1.

There are only 3 7 21, so the third number above is 3

The penultimate row is 2

21+5 26, so the third-to-last row is 26

In the number 1 9, multiply the single digit with 7 and have 4.

There are only 2 7 14, so the number in the penultimate row is 1

14+2 16, the number in the penultimate row is 16

In the number 1 9, the product of 7 is one digit.

There are only 1 7 7, so the first one in the first row is 1

The third line is 77 + 1 8, so the first one in the first row is 8, and the last two in the first row are the following numbers 6 and 6, which are 866 7 123 and 5

The second question looks from the third line, 8 times a single digit number, and there are only 8 9 72 for more than seventy, so the divisor is 9

The number in the third row is 2

The last digit is 3, and the single digit in the third to last row is 8

So the penultimate row is 5

There are only 5 9 45, so the first row is the second 5

The penultimate row of tens is 4

45+3 48, the third-to-last row is 4

72+4 76, the second row is 76

8 is written directly.

Question 1: The breakthrough du is on 4 and 1, only zhi7*3 answer has a digit is dao1, and 7*2 single digit is 4, so the quotient ten digits are.

Inside 2, you are 3, the final answer is 123 * 7 + 5 = 866

The second question: the breakthrough is 7, 8 * 9 = 72, so the dividend is 9, and then according to the back 5, you can push out 9 * 5 = 45, and the final answer is 85 * 9 + 3 = 768