4.25 equals () tons () kilograms 138 centimeters equals how many decimeters equals how many meters 3 kilograms 500 grams equals how many kilograms

4.25 equals () tons () kilograms 138 centimeters equals how many decimeters equals how many meters 3 kilograms 500 grams equals how many kilograms

4.25 is equal to (4) tons (250) kg
138 cm equals 13.8 decimeters equals 1.38 meters
3 kg 500 g equals 3.5 kg

Three times a number is equal to the number plus 12. What is the number?

The number is: 12 (3-1) = 6

It takes 6 minutes for a to make a part, 5 minutes for B, and 3 minutes for C. At present, the task of 1590 parts is assigned to three people, and they are required to complete it in the same time. How many parts should each person be assigned?

This is a problem of the least common multiple. To complete it at the same time, we must first work out the least common multiple of 6, 5 and 4.5. Their least common multiple should be 90, that is, a should do 15, B 18 and C 20 in 90 minutes, and make 53 in 90 minutes. Then we can calculate how many 90 minutes it takes, and divide 1590 by 53 to get 30, that is, it takes 2700 minutes to complete it together, and divide 2700 minutes by 6, 5 and 4.5 respectively, Can calculate a, B, C each person should be divided into how many parts. Too simple

7X-2 × 9 = 80 (solving equation)

7x-18=80
7x=80+18
7x=98
x=98/7
x14

A certain grain occupies three granaries of a, B and C. the grain stored in warehouse a accounts for 25% of the total stock. If 16 tons of grain are transported from the two warehouses and 7.5 tons are transported to warehouse B, then the three granaries are equal. How many meals are there in this grain station
Hurry up!!!!!!!!!!!!!!!!!!!!!!!!!

7.5/(1/3-25%)
=7.5/（1/12）
=90 tons

20% of a number is more than 40% of 70

(70 × 40% + 2) △ 20% = 30 △ 20% = 150 a: this number is 150

It's not right,
three
5 5 2
How to fill 4 sides so that the horizontal, vertical and oblique are equal to 12,
There are 3 digits in each row. There are 3 rows in total. The middle of the first row is 3, the second row is 552, and the middle of the third row is 4,
Is 423 in the last row wrong?

Just now, I did the same as the one above, but I found that the result was not right

In the equal ratio sequence {an}, given A2 = 2, A5 = 6, then what is A8 equal to?

From the properties of the equal ratio sequence, we can get: A5 * A5 = A2 * A8
So A8 = 18

Simple calculation of (8 / 9 + 1 / 12) × 35 / 5-36

(8 / 9 + 1 / 12) × 35 / 5-36
=(32/36+3/36)×5-35/36
=35/36×5-35/36
=35/36×4
=35/9

Given the number of columns A1, A2 Then a1-a2 + a3-a4 a2005-a2006+a2007=______ ．

a1-a2+a3-a4… a2005-a2006+a2007=1003（a1-a2）+a1=1003×（-1）+1=-1002．