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Vocabulary numerical expression - a mathematical sentence consisting of numbers and operations evaluate - to find the value of an expression with one or more operations order of operations – a set of rules for evaluating an expression with one or more operations. Vocabulary

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Presentation Transcript
slide1

Vocabulary

numerical expression- a mathematical sentence consisting of numbers and operations

evaluate- to find the value of an expression with one or more operations

order of operations– a set of rules for evaluating an expression with one or more operations

slide2

Vocabulary

variable- a symbol (like x or y) that is used in mathematical expressions to represent an unknown quantity

variable expression- a mathematical sentence consisting of numbers, variables and operations

slide3

Still UsingPEMDAS

Ex: 1 evaluate the expression when x = 8

7x + 15

slide4

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8

7x + 15 substitute

slide5

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15

slide6

Still UsingPEMDAS

Ex: 2aevaluate the expression when x = 8 and y = 2.

7x + 15 substitute

7(8) + 15 multiply

slide7

Still UsingPEMDAS

Ex: 2aevaluate the expression when x = 8 and y = 2.

7x + 15 substitute

7(8) + 15 multiply

56 + 15

slide8

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8 and y = 2.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

slide9

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8 and y = 2.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

slide10

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

Ex: 2evaluate the expression when x = 4 and y = 2.

slide11

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

Ex: 2evaluate the expression when x = 4 and y = 2.

x ·(y + 3)

slide12

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

Ex: 2evaluate the expression when x = 4 and y = 2.

x ·(y + 3)substitute

slide13

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

Ex: 2evaluate the expression when x = 4 and y = 2.

x · (y + 3)substitute

4 · (2 + 3)

slide14

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

Ex: 2evaluate the expression when x = 4 and y = 2.

x · (y + 3)substitute

4 · (2 + 3) p(add)

slide15

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

Ex: 2evaluate the expression when x = 4 and y = 2.

x · (y + 3)substitute

4 · (2 + 3) p(add)

4 · 5

slide16

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

Ex: 2evaluate the expression when x = 4 and y = 2.

x · (y + 3)substitute

4 · (2 + 3) p(add)

4 · 5 multiply

slide17

Still UsingPEMDAS

Ex: 1evaluate the expression when x = 8.

7x + 15 substitute

7(8) + 15 multiply

56 + 15 add

71

Ex: 2evaluate the expression when x = 4 and y = 2.

x · (y + 3)substitute

4 · (2 + 3) p(add)

4 · 5 multiply

20

slide18

Still UsingPEMDAS

Ex: 3evaluate the expression when x = 4 and y = 9.

slide19

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

slide20

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

substitute

slide21

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

substitute

slide22

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

substitute

add

slide23

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

substitute

add

slide24

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

substitute

add

multiply

slide25

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

substitute

add

multiply

slide26

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

substitute

add

multiply

divide

slide27

Still UsingPEMDAS

Ex: 3evaluate the expression when x =12 and y = 4

substitute

add

multiply

divide