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Step-2

Title: Adding signed numbers

Grade: 6-a Lesson: S1-L2

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

Lesson Steps

Step	Type	Explanation	Answer
1	Problem	Addition of integers: \$ (- 27) + (- 63) \$
2	Hint	The two integers are	\$ - 27,- 63 \$
3	Formula:	Here we apply the rule of addition of negative integers	\$ (-) + (-) = (-) \$
4	Step	Let us add both the negative integers	\$ - 27 + (- 63) \$
5	Step	After adding the negative integers	\$-27 - 63 \$
6	Step	After adding we get	\$ - 90 \$
7	Step	Therefore, the addition of integers is \$ - 90 \$.
8	Choice.A	This is not correct because it states -100, which is not the correct sum of (- 27) and (- 63)	-100
9	Choice.B	This is not correct because it suggests that the sum is -75, which is incorrect	-75
10	Choice.C	This is not correct because it doesn’t accurately represent the sum of (-27) and (-63). The sum of -27 and -63 is -90, not -85	-85
11	Choice.D	This is correct because it states - 90, which is the correct sum of (- 27) and (- 63)	-90
12	Answer	Option	D
13	Sumup	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Addition of integers:
\$ (- 27) + (- 63) \$

Hint

The two integers are

\$ - 27,- 63 \$

Formula:

Here we apply the rule of addition of negative integers

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

Step

Let us add both the negative integers

\$ - 27 + (- 63) \$

Step

After adding the negative integers

\$-27 - 63 \$

Step

After adding we get

\$ - 90 \$

Step

Therefore, the addition of integers is \$ - 90 \$.

Choice.A

This is not correct because it states -100, which is not the correct sum of (- 27) and (- 63)

-100

Choice.B

This is not correct because it suggests that the sum is -75, which is incorrect

-75

Choice.C

This is not correct because it doesn’t accurately represent the sum of (-27) and (-63). The sum of -27 and -63 is -90, not -85

-85

Choice.D

This is correct because it states - 90, which is the correct sum of (- 27) and (- 63)

-90

Answer

Option

Sumup

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