Math worksheet for converting weight units, including grams, kilograms, and milligrams.

Let me work through each conversion carefully.

Key conversions to remember:
- 1 kg = 1,000 g
- 1 g = 1,000 mg
- So 1 kg = 1,000,000 mg

Convert into grams:
1. 4 kg → 4 × 1,000 = 4,000 g
2. 1000 mg → 1000 ÷ 1,000 = 1 g
3. 50 kg → 50 × 1,000 = 50,000 g
4. 85000 mg → 85,000 ÷ 1,000 = 85 g
5. 9900 mg → 9,900 ÷ 1,000 = 9.9 g
6. 2 kg → 2 × 1,000 = 2,000 g

Convert into kilograms:
7. 7000 g → 7,000 ÷ 1,000 = 7 kg
8. 2300 g → 2,300 1,000 = 2.3 kg
9. 5000 g → 5,000 ÷ 1,000 = 5 kg
10. 1111 g → 1,111 ÷ 1,000 = 1.111 kg
11. 1000 g → 1,000 ÷ 1,000 = 1 kg
12. 12,000 g → 12,000 ÷ 1,000 = 12 kg

Convert into milligrams:
13. 5.5 g → 5.5 × 1,000 = 5,500 mg
14. 8 g → 8 × 1,000 = 8,000 mg
15. 18 g → 18 × 1,000 = 18,000 mg
16. 1 g → 1 × 1,000 = 1,000 mg
17. 2.565 g → 2.565 × 1,000 = 2,565 mg
18. 10 g → 10 × 1,000 = 10,000 mg

Let me double-check my calculations:
1. 4 × 1000 = 4000 ✓
2. 1000 / 1000 = 1 ✓
3. 50 × 1000 = 50000 ✓
4. 85000 / 1000 = 85 ✓
5. 9900 / 1000 = 9.9 ✓
6. 2 × 1000 = 2000 ✓
7. 7000 / 1000 = 7 ✓
8. 2300 / 1000 = 2.3 ✓
9. 5000 / 1000 = 5 ✓
10. 1111 / 1000 = 1.111 ✓
11. 1000 / 1000 = 1 ✓
12. 12000 / 1000 = 12 ✓
13. 5.5 × 1000 = 5500 ✓
14. 8 × 1000 = 8000 ✓
15. 18 × 1000 = 18000 ✓
16. 1 × 1000 = 1000 ✓
17. 2.565 × 1000 = 2565 ✓
18. 10 × 1000 = 10000 ✓

All calculations verified.

Final Answer:

Convert into grams:
1. 4 kg = 4,000 g
2. 1000 mg = 1 g
3. 50 kg = 50,000 g
4. 85,000 mg = 85 g
5. 9,900 mg = 9.9 g
6. 2 kg = 2,000 g

Convert into kilograms:
7. 7,000 g = 7 kg
8. 2,300 g = 2.3 kg
9. 5,000 g = 5 kg
10. 1,111 g = 1.111 kg
11. 1,000 g = 1 kg
12. 12,000 g = 12 kg

Convert into milligrams:
13. 5.5 g = 5,500 mg
14. 8 g = 8,000 mg
15. 18 g = 18,000 mg
16. 1 g = 1,000 mg
17. 2.565 g = 2,565 mg
18. 10 g = 10,000 mg