91影视

In the following exercise, simplify the expression:$65梅(-5)+(-28)梅(-7)$

In the following exercise, simplify the expression:$52梅(-4)+(-32)梅(-8)$

In the following exercise, simplify the expression:$9-2[3-8(-2\left)\right]$

In the following exercise, simplify the expression:$11-3[7-4(-2\left)\right]$

In the following exercise, simplify the expression:${(-3)}^2-24梅(8-2)$

In the following exercise, simplify the expression:${(-4)}^2-32梅(12-4)$

In the following question, evaluate the expression.

$y+\left(-14\right)$when (a) $y=-33$, (b) $y=30$.

In the following question, evaluate the expression.

$x+\left(-21\right)$when (a)$x=-27$, (b)$x=44$.

In the following question, evaluate the expression.

(a) $a+3$when $a=-7$

(b)$-a+3$when$a=-7$

In the following exercises, find the place value of each digit in the given numbers.

$164,285$ 鈸� $5,$鈸�$6,$鈸� $1,$鈸� $8,$ 鈸�$2$