Who is the best?

Addition

100

1+1=?

2

200

273+1157=?

1430

300

999+999=?

1998

400

192+1024

1216

500

1+4=5

2+5=12

3+6=21

8+11=?

40

Multiplication

100

9 x 2=?

18

200

25 x 25=?

625

300

10 x 200=?

2000

400

1 x 10=?

10

500

5+5+5=550

Add a line to the equation to satisfy the equation. 

(Do not add line to the equal sign)

545+5=550

Subtraction

100

17-2=?

15

200

278-888=?

-610

300

99-88=?

11

400

1975-278=?

1697

500

Before the King was dying, he left a message with all his might to show the clue of who murdered him. Who is the murderer?

Hint: LION

15.Dohoon 16.Shinju 17.Keonwoo 18.Yeongin

Keonwoo

Speed

100

2 x 2(1-2)=?

-4

200

5^2 x 5=?

625

300

10000/0 x 10=?

does not exist (undefined)

400

tan60+sin180+cos45-sin135=?

root 3

500

sin(1.5pi+x)=?

Answer in single trig form

cost