Math Problem Statement

A series of math problems involving arithmetic and fractions, such as: -3.127 + (-23.81), 3/2 - 2/3 - 1/4 - 3/4 - 5/6 + 10 2/3, and more.

Solution

Let's go through the questions in the image and solve them one by one:

10) 3.127+(23.81)-3.127 + (-23.81)

3.127+(23.81)=3.12723.81=26.937-3.127 + (-23.81) = -3.127 - 23.81 = -26.937 Answer: 26.937-26.937

11) 3223143456+1023\frac{3}{2} - \frac{2}{3} - \frac{1}{4} - \frac{3}{4} - \frac{5}{6} + 10 \frac{2}{3}

First, convert the mixed number 102310 \frac{2}{3} to an improper fraction: 1023=32310 \frac{2}{3} = \frac{32}{3} Now, find a common denominator for all the fractions, which is 12: 32=1812,23=812,14=312,34=912,56=1012,323=12812\frac{3}{2} = \frac{18}{12}, \quad \frac{2}{3} = \frac{8}{12}, \quad \frac{1}{4} = \frac{3}{12}, \quad \frac{3}{4} = \frac{9}{12}, \quad \frac{5}{6} = \frac{10}{12}, \quad \frac{32}{3} = \frac{128}{12} Now substitute the values: 18128123129121012+12812\frac{18}{12} - \frac{8}{12} - \frac{3}{12} - \frac{9}{12} - \frac{10}{12} + \frac{128}{12} Combine the numerators: 1883910+128=11618 - 8 - 3 - 9 - 10 + 128 = 116 So, the result is: 11612=293=923\frac{116}{12} = \frac{29}{3} = 9 \frac{2}{3} Answer: 9239 \frac{2}{3}

12) 93(23)93 - (-23)

93(23)=93+23=11693 - (-23) = 93 + 23 = 116 Answer: 116

13) 47.168+53.6247.168 + 53.62

47.168+53.62=100.78847.168 + 53.62 = 100.788 Answer: 100.788

14) 43+315+87+710- \frac{4}{3} + \frac{3}{15} + - \frac{8}{7} + \frac{7}{10}

  • Find a common denominator and solve the sum of fractions. I'll calculate this next.For question 14, the result of 43+315+87+710- \frac{4}{3} + \frac{3}{15} + - \frac{8}{7} + \frac{7}{10} is:

3312101.576- \frac{331}{210} \approx -1.576 Answer: 1121210-1 \frac{121}{210} or approximately 1.576-1.576.

15) 53(19)-53 - (-19)

53(19)=53+19=34-53 - (-19) = -53 + 19 = -34 Answer: 34-34

16) Subtract 5.44-5.44 from 7.33-7.33

This is the same as: 7.33(5.44)=7.33+5.44=1.89-7.33 - (-5.44) = -7.33 + 5.44 = -1.89 Answer: 1.89-1.89

17) 105141105 - 141

105141=36105 - 141 = -36 Answer: 36-36

18) 12+58+35+56+23-\frac{1}{2} + \frac{5}{8} + \frac{3}{5} + \frac{5}{6} + \frac{2}{3}

I'll calculate the sum of these fractions next.For question 18, the result of 12+58+35+56+23-\frac{1}{2} + \frac{5}{8} + \frac{3}{5} + \frac{5}{6} + \frac{2}{3} is:

89402.225\frac{89}{40} \approx 2.225 Answer: 29402 \frac{9}{40} or approximately 2.2252.225.


Would you like more details on any of the steps? Here are 5 related questions to deepen your understanding:

  1. How do you find the common denominator for fractions?
  2. Can you explain the difference between improper fractions and mixed numbers?
  3. What is the rule for adding and subtracting negative numbers?
  4. How can decimals be added with more precision?
  5. How do you convert a mixed number back into an improper fraction?

Tip: Always double-check your fractions by finding the least common denominator to avoid mistakes when adding or subtracting them!

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Math Problem Analysis

Mathematical Concepts

Addition
Subtraction
Fractions
Decimals
Mixed Numbers
Negative Numbers

Formulas

Sum of Fractions with Common Denominators
Conversion of Mixed Numbers to Improper Fractions
Addition and Subtraction of Negative Numbers

Theorems

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Suitable Grade Level

Grades 5-7