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PEMDAS
100

-4+9

5

100

9-3

6

100

-6x7

-42

100

-10 divided by -2

5

100
-9 + 12/3 

-5

200

-16+12

-4

200

26-(-19)

45

200

-12 x (-6)

72

200

100 divided by -5

-20

200

(12-2) - 3 x 4

-2

300

-4.3 + (-3.2)

-7.5

300

-5.32-45.2

-50.52

300

-13.5 x 4.1

-55.35

300

-1/4 divided by 3/8

-2/3

300

-3 - 10/2 +4

-4

400

(-1/2)+(2/7)

-3/14

400

(-5/9)-(-4/5)

11/45

400

(5/6) x (-8/10)

-2/3

400

-40.56 divided by 5.2

-7.8

400

(12/4) - 10 + 5 

-2

500

4+(-6)+12

10

500

-6 - 12 - 10 

-28

500

(-4/27) x (-6/8)

1/9

500

-15 divided by -5/8

24

500

36/(-9)(-2)+ (-9+7)

6