91Ó°ÊÓ

In the following exercise, find the opposite of each number:$\left(a\right)2\left(b\right)-6$

Simplify:

a) $6-(-13)$and $6+13$

b)$-5-(-1)$and$-5+1$

In the following exercise, find the opposite of each number:$\left(a\right)9\left(b\right)-4$

Simplify:

a) $4-(-19)$and $4+19$

b)$-4-(-7)$and$-4+7$

Simplify

8 − (−3 − 1) − 9

$−(−4)$

Round $206,981$ to the nearest: a hundred b thousand c ten thousand.

In the following exercises, write each number as a whole number using digits.

thirty-five thousand, nine hundred seventy-five

Simplify

12 − (−9 − 6) − 14

−(−8)