Question

1)728-161-161-213-134-25=?2)площадь квадрата со стороной 50 см, выраженная в дм в кв?3)периметр равностороннего треугольника со стороной 1 дм 1 см, выраженный в см?4)b:9=(227-195):8=?5)8*4+4*5+4*4=?6)4*8+4+4*5+2*5=?помогите решить

Answer 1

1) 34
2) 250 кв.см
3) 33 см
4) b:9=(227-195):8
    b:9=32:8
    b:9=4
    b=4x9
    b=36
5) 736
6) 1010

Answer 2

Sure! I'll help you solve these mathematical equations.

1) Equation: 728 - 161 - 161 - 213 - 134 - 25

To solve this equation, you need to subtract the numbers from left to right. 728 - 161 = 567 567 - 161 = 406 406 - 213 = 193 193 - 134 = 59 59 - 25 = 34

Therefore, the answer to the equation 728 - 161 - 161 - 213 - 134 - 25 is 34.

2) Equation: Area of a square with a side length of 50 cm expressed in dm²

To find the area of a square, you need to square the length of one of its sides. Since the side length is given in centimeters, you need to convert it to decimeters.

Given: Side length = 50 cm

To convert centimeters to decimeters, divide by 10: 50 cm ÷ 10 = 5 dm

Now, square the side length: 5 dm * 5 dm = 25 dm²

Therefore, the area of a square with a side length of 50 cm, expressed in dm², is 25 dm².

3) Equation: Perimeter of an equilateral triangle with a side length of 1 dm 1 cm, expressed in cm

An equilateral triangle has all three sides of equal length. To find the perimeter, you simply multiply the side length by 3.

Given: Side length = 1 dm 1 cm

To convert 1 dm 1 cm to centimeters, multiply the decimeters by 10 and add the centimeters: 1 dm * 10 cm/dm + 1 cm = 11 cm

Now, multiply the side length by 3 to find the perimeter: 11 cm * 3 = 33 cm

Therefore, the perimeter of an equilateral triangle with a side length of 1 dm 1 cm, expressed in cm, is 33 cm.

4) Equation: b : 9 = (227 - 195) : 8

To solve this equation, you need to perform the operations on each side of the equation.

Given: (227 - 195) : 8 = ?

First, subtract 195 from 227: 227 - 195 = 32

Then, divide 32 by 8: 32 ÷ 8 = 4

Therefore, the value of b that satisfies the equation b : 9 = (227 - 195) : 8 is 4.

5) Equation: 8 * 4 + 4 * 5 + 4 * 4

To solve this equation, you need to perform the multiplication and addition operations according to the order of operations (PEMDAS/BODMAS).

Given: 8 * 4 + 4 * 5 + 4 * 4 = ?

First, perform the multiplications: 8 * 4 = 32 4 * 5 = 20 4 * 4 = 16

Then, perform the additions: 32 + 20 + 16 = 68

Therefore, the answer to the equation 8 * 4 + 4 * 5 + 4 * 4 is 68.

6) Equation: 4 * 8 + 4 + 4 * 5 + 2 * 5

To solve this equation, you need to perform the multiplication and addition operations according to the order of operations (PEMDAS/BODMAS).

Given: 4 * 8 + 4 + 4 * 5 + 2 * 5 = ?

First, perform the multiplications: 4 * 8 = 32 4 * 5 = 20 2 * 5 = 10

Then, perform the additions: 32 + 4 + 20 + 10 = 66

Therefore, the answer to the equation 4 * 8 + 4 + 4 * 5 + 2 * 5 is 66.

I hope this helps! Let me know if you have any further questions.