one zero
two zeros
3+ zeros
100

210 - 114 = ?

96

100

600 - 280 = ?

320

100

6000 - 4527 = ?

1473

200

501 - 215 = ?

286

200

700 - 401 = ?

299
200

5030 - 1492 = ?

3538

300

803 - 621 = ?

182

300

500 - 142= ?

358

300

60,000 - 23,015 = ?

36,985

400

650 - 490 = ?

160

400

800 - 74 = ?

726

400

500,000 - 392, 618 = ?

107, 382

500

907 - 369 = ?

538

500

900 - 624 = ?

276

500

9,090,901 - 2,684,835 = ?

6,406,066

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