Question

Помогите пж дам 35 баллов задание по математике1) а)1.6•(-45)=б)-135.2:(-6.5)= в)-1 7/8•1 1/3=г)1 2/3:(-3 1/3)=2)(-9.18:3.4-3.7)•2.1+2.04=(по действиям) выразите числа 8/27 и 2 9/3 в виде приближенного значения десятичной дроби до сотых 4) 3/7•(-0.54)-1.56•3/7=(по действиям)пж очень срочно и пришлите пж фотку только пж напешите правильный ответ

Answer 1

№1
а)-72
б)20.8
в)-187/24
г)-12/31
№2
1)-9.18:3.4=-2.7
2)-2.7-3.7=-6.4
3)-6.4*2.1=-13.44
4)13.44+2.04=-11.4
ответ=-11.4
№3
8/27=0.30
2 9/3=5.00
№4
3/7 это общий множитель
1)-0.54-1.56=-2.1
2)-2.1*3/7=9/10

Answer 2

1) a) 1.6 • (-45) = b) -135.2 : (-6.5) = c) -1 7/8 • 1 1/3 = d) 1 2/3 : (-3 + 1/3) = 2) (-9.18 : 3.4 - 3.7) • 2.1 + 2.04 = 3) Express the numbers 8/27 and 2 9/3 as approximate decimal values to the hundredths. 4) 3/7 • (-0.54) - 1.56 • 3/7 =

1) Solving Mathematical Expressions

a) To solve 1.6 • (-45), we multiply 1.6 by -45: 1.6 • (-45) = -72 [[1]]

b) To solve -135.2 : (-6.5), we divide -135.2 by -6.5: -135.2 : (-6.5) = 20.8 [[2]]

c) To solve -1 7/8 • 1 1/3, we multiply -1 7/8 by 1 1/3: -1 7/8 • 1 1/3 = -2 1/4 [[3]]

d) To solve 1 2/3 : (-3 + 1/3), we first simplify the expression inside the parentheses: -3 + 1/3 = -8/3 Then, we divide 1 2/3 by -8/3: 1 2/3 : (-3 + 1/3) = -1/2 [[4]]

2) Solving a Complex Expression

To solve (-9.18 : 3.4 - 3.7) • 2.1 + 2.04, we follow the order of operations (PEMDAS/BODMAS): 1. Simplify the expression inside the parentheses: -9.18 : 3.4 - 3.7 = -2.7 - 3.7 = -6.4 2. Multiply the result by 2.1: -6.4 • 2.1 = -13.44 3. Add 2.04 to the previous result: -13.44 + 2.04 = -11.4 [[5]]

3) Expressing Fractions as Decimal Values

To express the fractions 8/27 and 2 9/3 as approximate decimal values to the hundredths:

a) 8/27: Divide 8 by 27: 8 ÷ 27 ≈ 0.296 [[6]]

b) 2 9/3: Convert the mixed number to an improper fraction: 2 9/3 = (2 • 3 + 9) / 3 = 15/3 Divide 15 by 3: 15 ÷ 3 = 5 [[7]]

Therefore, the approximate decimal values to the hundredths are: a) 8/27 ≈ 0.30 b) 2 9/3 ≈ 5.00

4) Solving Another Mathematical Expression

To solve 3/7 • (-0.54) - 1.56 • 3/7, we follow the order of operations:

1. Multiply 3/7 by -0.54: 3/7 • (-0.54) = -0.2314

2. Multiply 1.56 by 3/7: 1.56 • 3/7 = 0.6686

3. Subtract the second result from the first: -0.2314 - 0.6686 = -0.9000

Therefore, the result is -0.9000.

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