Evaluating Numerical Expressions Lesson Slides: 8 Slides

8 Slides • 7 Questions

1

Evaluating Numerical Expressions

How can you use the Order of Operations to evaluate expressions with decimals?

2

Fill in the Blanks

Use Order of Operations to evaluate this expression.

$10\times\left[3.7+\left(24\div3\right)\right]$

Type answer...

3

4

How can you evaluate expressions with brackets and variables?

$\left[6\left(x-3.5\right)\right]\div12+4.2$

5

$\left[6\left(x-3.5\right)\right]\div12+4.2$ x = 9.5

Inside parenthesis first (x - 9.5)
Substitute 9.5 for x.
(9.5 - 3.5) = 6
Rewrite the new expression.

6

$\left[6\times6\right]\div12+4.2$

Brackets next.
[6 x 6] = 36
Rewrite the new expression.

7

$36\div12+4.2$

Division is next.
$36\div12$ = 3
Rewrite the new expression.

8

$3+4.2$

Complete addition, the last step.
3 + 4.2 = 7.2

9

Now, you try.

Remember to follow PEMDAS

10

Multiple Choice

$\left(7.8\div2\right)\times12$

1

46.8

2

117.6

3

69.6

4

15.9

11

Fill in the Blanks

$9.2+\left(x\ \times3\right)$

Evaluate this expression when X = 3

Type answer...

12

Multiple Choice

$5.6+\left(3\times9.6-4.8\right)$

1

20

2

77.76

3

41.28

4

29.6

13

Fill in the Blanks

$3^2+\left(7.1-x\times3\right)$

Evaluate this expression when x = 2

Type answer...

14

Multiple Choice

$\left[\left(4.2\times3.4\right)-9.28\right]$

1

16.88

2

5

3

1.5

4

24.7

15

Poll

How confident are you with evaluating numerical expressions?

I feel great!

I feeling okay.

I am confused.

Evaluating Numerical Expressions

How can you use the Order of Operations to evaluate expressions with decimals?

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