Step-5

Title: Subtraction Fractions

Grade: 8-a Lesson: S1-L6

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step Type Explanation Answer

1

Problem

Subtract \$8 6/40 - 6 4/30\$.

2

Step

Given Fraction

\$8 6/40 - 6 4/30\$

3

Step

We change the mixed fractions into improper fractions

\$326/40 - 184/30\$

4

Step

We need to reduce the fraction

\$163/20 - 92/15\$

5

Step

Now, take the LCM of the denominators

LCM of 20,15 is 60

6

Step

Multiply the numerator and denominator of each fraction by a number so that they have the LCM as their new denominator

\$((163\times3)-(92\times4))/60\$

7

Step

Subtract the numerators and keep the denominator the same

\$(489 - 368)/60\$

8

Step

After subtracting we get

\$121/60\$

9

Step

Divide the numerator with the denominator

\$121\div60\$

10

Step

You will get values of the quotient(q) and remainder(r)

q = 2, r = 1

11

Step

\$"Mixed fraction"\$ = \$"Whole number" + "Numerator"/"Denominator"\$

\$ 2 1/60\$

12

SumUp

Can you summarize what you’ve understood in the above steps?

13

Choice.A

It is correct because the simplified result of the subtraction is \$2 1/60\$

\$2 1/60\$

14

Choice.B

\$3 2/60\$ is incorrect because the simplified result is \$2 1/60\$

\$3 2/60\$

15

Choice.C

\$4 3/32\$ is incorrect for the same reason; the correct result is \$2 1/60\$

\$4 3/42\$

16

Choice.D

\$5 6/45\$ is incorrect as the simplified result is \$2 1/60\$

\$5 6/45\$

17

Answer

Option

A

18

SumUp

Can you summarize what you’ve understood in the above steps?


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