Evaluate \(1 - \left(\frac{1}{5} + 1\frac{2}{3}\right) + \left(5 + 1\frac{2}{3}\right)\)

Assessment: JAMB UTME - Mathematics - 2017 Subject: General Mathematics

Question 1 Report

Evaluate \(1 - \left(\frac{1}{5} + 1\frac{2}{3}\right) + \left(5 + 1\frac{2}{3}\right)\)

Answer Details

?

1 ? ( 1 5 × 2 3 ) + ( 5 + 2 3 ) 1 - \left( \frac{1}{5} \times \frac{2}{3} \right) + \left( 5 + \frac{2}{3} \right)

Step 1: Evaluate 1 5 × 2 3 \frac{1}{5} \times \frac{2}{3}

1 5 × 2 3 = 1 × 2 5 × 3 = 2 15 \frac{1}{5} \times \frac{2}{3} = \frac{1 \times 2}{5 \times 3} = \frac{2}{15}


Step 2: Subtract 2 15 \frac{2}{15} from 1

1 ? 2 15 = 15 15 ? 2 15 = 13 15 1 - \frac{2}{15} = \frac{15}{15} - \frac{2}{15} = \frac{13}{15}

Step 3: Simplify 5 + 2 3 5 + \frac{2}{3}


First, convert 5 5 to a fraction with a denominator of 3:

5 = 15 3 5 = \frac{15}{3}

So,

5 + 2 3 = 15 3 + 2 3 = 17 3 5 + \frac{2}{3} = \frac{15}{3} + \frac{2}{3} = \frac{17}{3}


Step 4: Combine the results

13 15 + 17 3 \frac{13}{15} + \frac{17}{3}


To combine these fractions, find a common denominator. The least common multiple of 15 and 3 is 15:

Convert 17 3 \frac{17}{3} to a fraction with a denominator of 15:

17 3 = 17 × 5 3 × 5 = 85 15 \frac{17}{3} = \frac{17 \times 5}{3 \times 5} = \frac{85}{15}

Now add the fractions:

13 15 + 85 15 = 13 + 85 15 = 98 15 \frac{13}{15} + \frac{85}{15} = \frac{13 + 85}{15} = \frac{98}{15}


Simplify the fraction if possible:

98 15 = 6 8 15 \frac{98}{15} = 6 \frac{8}{15}


Thus, the evaluated expression is:

6 8 15 \boxed{6 \frac{8}{15}}

Download The App On Google Playstore

Everything you need to excel in your exams

Green Bridge CBT Mobile App
Personalized AI Learning Chat Assistant
200,000+ Exam Questions Across IGCSE, JAMB, WAEC & NECO
Over 3,900 Lesson Notes
Offline Support - Learn Anytime, Anywhere
Green Bridge Timetable
Literature Summaries & Potential Questions
Track Your Performance & Progress
In-depth Explanations for Comprehensive Learning