Question

9-2-8+4-21=(-9)+(-8)+(+4)+(-21)= -3-8+12-4+11=(-3)+(-8)+(+12)+(-4)+(+11)= -16+9+27-11-8= 4-5+11-9-4= -16-7+32-21+17= Решите пожалуйста если сможете.Просто я не понимаю эти уравнения.Если сможете то пожалуйста объясните.Заранее спасибо:3

Answer 1

9-2-8+4-21=(+9)+(-2)+(-8)+(+4)+(-21)=-(2+8+21)+(9+4)=-31+13=-(31-13)=-18

-3-8+12-4+11=(-3)+(-8)+(+12)+(-4)+(+11)=-(3+8+4)+(12+11)=-15+23=23-15=8

-16+9+27-11-8=(-16)+(+9)+(+27)+(-11)+(-8)=-(16+11+8)+(9+27)=
=-35+36=36-35=1

4-5+11-9-4=(+4)+(-5)+(+11)+(-9)+(-4)=-(5+9+4)+(4+11)=-18+15=-(18-15)=-3

-16-7+32-21+17=(-16)+(-7)+(+32)+(-21)+(+17)=-(16+7+21)+(32+17)=
=-44+49=49-44=5
это не уравнения,то сложение чисел с разными знаками.Сначала складываем числа со знаком"-" и пишем перед скобкой"-", потом складываем со знаком "+". и пишем +. А потом отнимает от чего можем,т.е. отнимает от числа,у которого модуль больше и ставим в ответе знак большего модуля. например  -44+49=49-44=5    или
-18+15=-(18-15)=-3

Answer 2

Solving the Equation: 9 - 2 - 8 + 4 - 21 = (-9) + (-8) + (+4) + (-21) = -3 - 8 + 12 - 4 + 11 = (-3) + (-8) + (+12) + (-4) + (+11) = -16 + 9 + 27 - 11 - 8 = +4 - 5 + 11 - 9 - 4 = -16 - 7 + 32 - 21 + 17

To solve this equation, we need to perform the operations in the given order of operations (also known as PEMDAS or BODMAS). This means we need to start with any parentheses, then perform any multiplication or division, and finally perform any addition or subtraction.

Let's break down the equation step by step:

1. 9 - 2 - 8 + 4 - 21: - Start with subtraction from left to right: 9 - 2 = 7, 7 - 8 = -1, -1 + 4 = 3, 3 - 21 = -18. - So, 9 - 2 - 8 + 4 - 21 = -18.

2. (-9) + (-8) + (+4) + (-21): - Start with addition from left to right: -9 + (-8) = -17, -17 + 4 = -13, -13 + (-21) = -34. - So, (-9) + (-8) + (+4) + (-21) = -34.

3. -3 - 8 + 12 - 4 + 11: - Start with subtraction from left to right: -3 - 8 = -11, -11 + 12 = 1, 1 - 4 = -3, -3 + 11 = 8. - So, -3 - 8 + 12 - 4 + 11 = 8.

4. (-3) + (-8) + (+12) + (-4) + (+11): - Start with addition from left to right: -3 + (-8) = -11, -11 + 12 = 1, 1 + (-4) = -3, -3 + 11 = 8. - So, (-3) + (-8) + (+12) + (-4) + (+11) = 8.

5. -16 + 9 + 27 - 11 - 8: - Start with addition and subtraction from left to right: -16 + 9 = -7, -7 + 27 = 20, 20 - 11 = 9, 9 - 8 = 1. - So, -16 + 9 + 27 - 11 - 8 = 1.

6. +4 - 5 + 11 - 9 - 4: - Start with addition and subtraction from left to right: 4 - 5 = -1, -1 + 11 = 10, 10 - 9 = 1, 1 - 4 = -3. - So, +4 - 5 + 11 - 9 - 4 = -3.

7. -16 - 7 + 32 - 21 + 17: - Start with addition and subtraction from left to right: -16 - 7 = -23, -23 + 32 = 9, 9 - 21 = -12, -12 + 17 = 5. - So, -16 - 7 + 32 - 21 + 17 = 5.

Therefore, the final result of the equation is:

9 - 2 - 8 + 4 - 21 = (-9) + (-8) + (+4) + (-21) = -3 - 8 + 12 - 4 + 11 = (-3) + (-8) + (+12) + (-4) + (+11) = -16 + 9 + 27 - 11 - 8 = +4 - 5 + 11 - 9 - 4 = -16 - 7 + 32 - 21 + 17 = 5.

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