Question

1)-2×(-5)+20:(-2)-10×(-1)-9 2)6×(-15-5)-9:(-20+11) 3)(-43,56:0,66+50):(-0,2) 4)12×(-3/4)-15:3/4

Answer 1

Ответ:

Пошаговое объяснение:

1) 10+(-40)+10-9=-29

2) 6*(-20)-9:(-9)=-120-1=-121

3) (-66+50):(-0,2)=-16: (-0,2)=80

4) 12*(-0,75)-15:0,75= -9-20=-29

Answer 2

Let's solve each of the expressions step by step:

1. -2×(-5) + 20:(-2) - 10×(-1) - 9

Step 1: -2×(-5) = 10 Step 2: 20:(-2) = -10 (division of a positive number by a negative number is negative) Step 3: 10 - 10×(-1) = 20 Step 4: 20 - 9 = 11

Answer: 11

2. 6×(-15-5) - 9:(-20+11)

Step 1: -15 - 5 = -20 Step 2: 6×(-20) = -120 Step 3: -20 + 11 = -9 Step 4: 9:(-9) = -1 (division of a negative number by a negative number is positive) Step 5: -120 - (-1) = -119

Answer: -119

3. (-43.56:0.66 + 50):(-0.2)

Step 1: -43.56 ÷ 0.66 ≈ -65.8181818... Step 2: -65.8181818... + 50 = -15.8181818... Step 3: -15.8181818... ÷ (-0.2) ≈ 79.090909...

Answer: 79.090909... (repeating decimal)

4. 12×(-3/4) - 15 ÷ 3/4

Step 1: 12×(-3/4) = -9 Step 2: 15 ÷ (3/4) = 15 × (4/3) = 20

Answer: -9 - 20 = -29

So, the final answers are:

1. 11
2. -119
3. 79.090909... (repeating decimal)
4. -29