Addition of integers:
\$ 21 + (- 18) + (- 6) + 7 \$

The integers are

\$ 21,- 18,- 6 and 7 \$

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

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

Let us add the positive and negative integers

\$ 21 + (- 18) + (- 6) + 7 \$

After adding the positive and negative integers

\$+28 - 24\$

After simplification

\$ 4 \$

Therefore, the addition of integers is \$ 4 \$.

This total does not reflect the correct sum of 21+(−18)+(−6)+7 which is 4

6

This is correct because it accurately represents the sum of the given integers

4

This sum does not represent the addition of 21+(−18)+(−6)+7 which is 4 not 28

28

This result is not obtained by adding 21+(−18)+(−6)+7 which is 4 not 16

16

Option

B

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