Show:
Division
Multiplication
Addition
Subtraction
100

360:3

120

100

12*20

240


100

1200+1900

3100

100

5700-3200

2500

200

270:90

3

200

80*9

720

200

640+970

1610

200

7500-4900

2600

300

480:60

8

300

30*8

240

300

1600+2300

3900

300

240-170

70

400

810:90

9

400

25*100

2500

400

3000+2400

5400

400

Round to the nearest 100 then subtract:
2899-2101

800

500

630:90

7

500

40*10

400

500
Round to the nearest hundred then add: 

2465+3190

5700

500

5500-3100

2400