1. Place Value

a) 7 → Hundreds
b) 8 → Thousands
c) 0 → Tens

2. Expanded Form

a) 3456 = 3000 + 400 + 50 + 6
b) 9023 = 9000 + 0 + 20 + 3
c) 6789 = 6000 + 700 + 80 + 9

3. Comparing Numbers

a) 4526 < 4562
b) 3009 < 3090
c) 8999 = 8999

4. Writing Numbers

a) 2087 → Two thousand eighty-seven
b) 5300 → Five thousand three hundred
c) 4765 → Four thousand seven hundred sixty-five

5. Ascending and Descending Order

a)

• Ascending: 2431, 3214, 3421, 4123

• Descending: 4123, 3421, 3214, 2431
  b)

• Ascending: 1980, 8091, 8901, 9801

• Descending: 9801, 8901, 8091, 1980

6. Addition and Subtraction

a) 3425 + 1346 = 4771
b) 5632 - 2417 = 3215

7. Forming Numbers

a)

• Largest: 7530

• Smallest: 0357 (or 357 if leading zeros are omitted)

  b)

• Largest: 9642

• Smallest: 2469

8. Word Problems

a) Total items sold = 2345 + 1678 = 4023
b) Difference in cars produced = 7856 - 6723 = 1133

End of Answer Key

Questions

Answer Key: Numbers up to 9999