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Lesson Example Discussion Quiz: Class Homework

Step-5

Title: Subtracting signed numbers

Grade: 6-b Lesson: S1-L3

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

Discussion: Step1 Step2 Step3 Step4 Step5

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Subtraction of integers: \$ (- 21) - (+ 5) - ( - 10 ) \$
2	Hint	The three integers are	\$ - 21 , 5 , - 10 \$
3	Step	Subtraction problem turns into an addition problem	\$ (- 21) + ( - 5 ) + 10 \$
4	Step	After subtractio problem turns into an addition problem	\$ ((- 21) + ( - 5 )) + 10 \$
5	Step	Here we apply the rule of addition of negative integers	\$ (-) + (-) = (-) \$
6	Step	Let us add both the negative integers	\$ (- 21 + (- 5)) + 10 \$
7	Step	After adding both negative integers	\$(- 21 - 5) + 10 \$
8	Step	After simplification	\$- 26 +10 \$
9	Formula:	If we follow the addition rule of negative and positive integers	\$ (-) + (+) = "use the sign of larger absolute value number" \$
10	Step	Let us add both the negative integers	\$ - 26 + 10 \$
11	Step	After adding we get	\$ - 16 \$
12	Step	Therefore, the subtraction of integers is \$ - 16 \$.
13	Choice.A	The result is incorrect as it yields a negative value instead of a positive one	16
14	Choice.B	This choice is inaccurate as it applies the rules of subtracting integers wrongly	-22
15	Choice.C	This is the correct result, as explained above	-16
16	Choice.D	The subtraction yields a negative outcome, not a positive one. Therefore, it is incorrect	22
17	Answer	Option	C
18	Sumup	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Subtraction of integers:
\$ (- 21) - (+ 5) - ( - 10 ) \$

Hint

The three integers are

\$ - 21 , 5 , - 10 \$

Step

Subtraction problem turns into an addition problem

\$ (- 21) + ( - 5 ) + 10 \$

Step

After subtractio problem turns into an addition problem

\$ ((- 21) + ( - 5 )) + 10 \$

Step

Here we apply the rule of addition of negative integers

\$ (-) + (-) = (-) \$

Step

Let us add both the negative integers

\$ (- 21 + (- 5)) + 10 \$

Step

After adding both negative integers

\$(- 21 - 5) + 10 \$

Step

After simplification

\$- 26 +10 \$

Formula:

If we follow the addition rule of negative and positive integers

\$ (-) + (+) = "use the sign of larger absolute value number" \$

Step

Let us add both the negative integers

\$ - 26 + 10 \$

Step

After adding we get

\$ - 16 \$

Step

Therefore, the subtraction of integers is \$ - 16 \$.

Choice.A

The result is incorrect as it yields a negative value instead of a positive one

Choice.B

This choice is inaccurate as it applies the rules of subtracting integers wrongly

-22

Choice.C

This is the correct result, as explained above

-16

Choice.D

The subtraction yields a negative outcome, not a positive one. Therefore, it is incorrect

Answer

Option

Sumup

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

Discussion: Step1 Step2 Step3 Step4 Step5