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100

What is..

3-1

2

100

What is..

15-10

5

100

What is..

220-80

140

100

What is..

150-100

50

100

What is..

5-1

4

200

What is..

5-2

3

200

What is..

22-18

4

200

What is..

400-60

340

200

What is..

200-100

100

200

What is..

56-53

3

300
What is..

8-3

5

300

What is..

30-15

15

300

What is..

98-72

26

300

What is..

300-120

80

300

What is..

40-32

8

400

What is..

9-3

6

400

What is..

40-30

10

400

What is..

80-13

67

400

What is..

220-160

60

400

What is..

86-6

80

500

What is..

10-1

9

500

What is..

70-40

30

500

What is..

900-720

180

500

What is..

700-430

270
500

What is..

77-11

66