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Step-5

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: \$ 22 + (- 91) + 13 + 71 \$
2	Hint	The integers are	\$ 22,- 91,13 and 71 \$
3	Formula:	Here we apply the rule of addition of positive and negative integers	\$ (+) + (-) = "use the sign of larger absolute value number" \$
4	Step	Let us add the positive and negative integers	\$ 22 + (- 91) + 13 + 71 \$
5	Step	After add the positive and negative integers	\$22 - 91 + 13 + 71 \$
6	Step	After simplification	\$+ 106 - 91 \$
7	Step	After adding	\$ 15 \$
8	Step	Therefore, the addition of integers is \$ 15\$.
9	Choice.A	This is not correct is because it does not reflect the accurate sum of the integers given	17
10	Choice.B	This is correct because it represents the correct sum of the given integers. The sum is positive 15	15
11	Choice.C	This representation is inaccurate, as it only considers the initial number, not the subsequent additions	22
12	Choice.D	This is not correct because it doesn’t represent the correct sum of the given integers. The sum is positive 15, not negative 12	-12
13	Answer	Option	B
14	Sumup	Can you summarize what you’ve understood in the above steps?

Step

Type

Explanation

Answer

Problem

Addition of integers:
\$ 22 + (- 91) + 13 + 71 \$

Hint

The integers are

\$ 22,- 91,13 and 71 \$

Formula:

Here we apply the rule of addition of positive and negative integers

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

Step

Let us add the positive and negative integers

\$ 22 + (- 91) + 13 + 71 \$

Step

After add the positive and negative integers

\$22 - 91 + 13 + 71 \$

Step

After simplification

\$+ 106 - 91 \$

Step

After adding

\$ 15 \$

Step

Therefore, the addition of integers is \$ 15\$.

Choice.A

This is not correct is because it does not reflect the accurate sum of the integers given

Choice.B

This is correct because it represents the correct sum of the given integers. The sum is positive 15

Choice.C

This representation is inaccurate, as it only considers the initial number, not the subsequent additions

Choice.D

This is not correct because it doesn’t represent the correct sum of the given integers. The sum is positive 15, not negative 12

-12

Answer

Option

Sumup

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