Math that I know you will get wrong

Math 1

100

1-0=?

1.000000000000000000000000000

200

2/3

0.6666666666666666666666666

300

3.141592654

What is Pi?

400

400*400/400+400-400=?

400

500

4/0=?

DIVIDE BY ZERO ERROR 

Undefined

Math 2

100

2-3=?

-1

200

3/8

0.375

300

3/3/3/3/3/3/4=?

0.003086419753

400

0+1+2+3+4+5+6+7+8+9=?

45

500

6/2*(1+2)=?

9

Math 3

100

8+90.99999

99

200

7/8.0

0.875

300

Old mcyourmom was on a plane 23 years ago on 9/9/01 heading to New York, when the plane landed it had been 2 days since it took flight. How old is mcyourmom now if he was 33 in 2001?

33. Old mcyourmom died on 9/11/01 because he was on the plane that crashed into to the twin towers.

400

9-8-7-6-5-4-3-2-1-0=?

-27

500

8/2*(2+2)=?

16

Math 4

100

6*2

12

200

9/8

1.125

300

54.789*98.908083=?

5419.074959

400

5% of 100

5

500

9-3 divided by 1/3 +1=?

1

Math 5

100

13/2

6.5

200

7/5.9999999999999

1.166666666666666666666666666666666666

300

1/2 = x/8

x=4

400

34% of 456

155.04

500

9-9/9+9-9/9=?

16