Number Riddles
Add 100
Expanded Form
Subtract 10
100

I have 1 hundred, 2 tens, and 4 ones. What number am I?

124

100

160 + 100

260

100

123

100 + 20 + 3 = 123

100

100 - 10

90
200

I have 2 hundreds, 8 tens, and 7 ones. What number am I?

287

200

340 + 100

440

200

245

200 + 40 + 5 = 245

200

230 - 10

220

300

I have 1 hundred, 11 tens, and 6 ones. What number am I?

216

300

532 + 100

632

300

429

400 + 20 + 9 = 429

300

347 - 10

337

400

I have 1 hundred, 15 tens, and 7 ones. What number am I?

257

400

723 + 100

823

400

814

800 + 10 + 4 = 814

400

109 - 10

99

500

I have 3 hundreds, 12 tens, and 9 ones. What number am I?

429

500

899 + 100

999

500

706

700 + 6 = 706

500

307 - 10

297

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