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order of operations
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subtract integers
multiply/divide integers
combination
100

What do all the letters in PEMDAS stand for?

parentheses, exponents, multiply, divide, add, subtract

100

-9 + -9 + 7

-11

100

-13 - - 39 

26

100

Explain why a negative number times a positive number is equal to a negative number.

Multiplication is repeated addition, if we add negative numbers to negative numbers the result is a more negative number.

100

− 8 x (2 − 6) ÷ 2

16

200

(8+3)2 + 18 ÷ 3

127

200

-1.042 + 0.93

-0.112
200

-9 - 8.05

-17.05

200

-14 x 13 

-182

200

20 ÷ 4 −14 ÷ 2

-2

300

36 + 108 ÷ 12

45

300

-1234 + -5678

-6912

300

1024 - - 365

1389

300

(-87)^2

7569

300

7 - (-2)3

15

400

20 ÷ (4 − (10 − 8))

10

400

405 + - 34.78 

370.22

400

-98 - x = 47

x = - 145

400

-10 x -5 x 4.5

225

400

(-1) x (2-6)2 ÷ 8 + 8 - 3 x 4

-6

500

(8 × (6-3) ÷ 4)2

36
500

x + -35 = 70

x = 105

500

-45 - - 47 - 30 =

-28

500
4.35 x - 6.75 =

-29.3625

500

4 ⋅ 5 −10 − 2(1 − 2) + 5

17