Show:
Multiplication
Division
Addition
Subtraction
SURPRISE!
100
2/5 x 1/3 
What is 2/15
100

1/5 ÷ 6

What is 1/30
100
1/9 + 2/3
What is 7/9 
100
3 1/2 - 2 1/2
What is 1
100
6/12 x 1/2
What is 6/24 or 1/4 
200
2/3 x 1/2 
What is 2/6 or 1/3 
200

7/12 ÷ 8 

What is 7/96
200
1/7 + 1/4 
What is 11/28
200
3 1/2 - 2 5/9
What is 17/18
200
1 2/4 + 5 3/8
What is 6 7/8
300
5/6 x 2/3
What is 10/18 or 5/9 
300

3/2 ÷ 4/9 

What is 27/8 or 3 1/8
300
4 3/6 + 2 2/8 
What is 6 3/4
300
2 2/5 - 1 1/3
What is 16/15 or 1 1/15
300

1/3 ÷ 10

What is 1/30
400
7/10 x 1/5 
What is 7/50
400

7/4 ÷ 5/12

What is 21/5 or 4 1/5 
400
4 2/7 + 2 5/9 
What is 6 53/63
400
5 8/15 - 3 5/45
What is 2 9/45
400

1/15 ÷ 3

 What is 1/45 
500
4/7 x 3/4 
What is 3/7 
500

4/13 ÷ 5/14

What is 56/65 
500
2 1/5 + 1 3/4 
What is 3 19/20
500
5 3/4 - 4 1/52
What is 1 38/52 or 1 19/26
500
8 3/4 - 4 2/6
What is 4 5/12