Show:
Subtraction
Addition
Round to nearest 100
Round to nearest 10
Round to nearest 100 and THEN subtract
100

200 - 125 =

75

100

200 + 135 =

335

100

225

200

100

225

230

100

225 - 125 =

100

200

300 - 236 =

64

200

400 + 144 =

544

200

444

400

200

42

40

200

499 - 320 = 

200

300

100-52 =

48

300

44 + 11 + 5 =

60

300

999

1,000

300

791

790

300

450 - 200 =

300

400

550 - 425 =

125

400

550 + 158 =

708

400

889

900

400

899

900

400

728 - 425 =

300

500

675 - 423 =

252

500

625 + 225 = 

850

500

745

700

500

39

40

500

888 - 777 = 

100