Question

( x - 80 ):40=640 , (x-80)×40=640 , x-80= 640:40, x-80= 640×40 4класс

Answer 1

1) (x-80):40=640
x-80=640×40
x-80=25600
x=25600+80
x=25680
2) (x-80)×40=640
40x-3200=640
40x=640+3200
40x=3840
X=96
3) x-80=640:40
x-80=96
x=176
4) x-80=640×40
x-80=25600
x=25680

Answer 2

It appears that you have written a few equations. Let's break them down step by step:

1. (x - 80) / 40 = 640: This equation states that the quantity (x - 80) divided by 40 is equal to 640. To solve for x, you can multiply both sides of the equation by 40 to isolate x:

(x - 80) / 40 * 40 = 640 * 40 (x - 80) = 25600

Now, to isolate x, you can add 80 to both sides of the equation:

(x - 80) + 80 = 25600 + 80 x = 25680

Therefore, the solution to this equation is x = 25680.

2. (x - 80) × 40 = 640: This equation states that the quantity (x - 80) multiplied by 40 is equal to 640. To solve for x, you can divide both sides of the equation by 40 to isolate x:

(x - 80) × 40 / 40 = 640 / 40 (x - 80) = 16

To isolate x, you can add 80 to both sides of the equation:

(x - 80) + 80 = 16 + 80 x = 96

Therefore, the solution to this equation is x = 96.

Please note that these solutions are based on the information provided. If there are additional details or context that I'm not aware of, the solutions might be different.