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Grades 3 Math - Elementary School - Addition and Subtraction (Decimals)
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Avg score: 62% • Most missed: “8.8 - 6.4 - 8.8 + 19.6 = ?”
  1. Add the whole numbers first, then add the decimal parts. For example, 1.5 + 3.6 - 2.4 = (1 + 3 - 2) + (0.5 + 0.6 - 0.4) = 2 + 0.7 = 2.7
  2. With numbers less than 1,000, add the hundreds first, then the tens and then the units. For example: 120 + 360 + 25 + 8 = (100 + 300) + (20 + 60 + 20) + (5 + 8) = 400 + 100 + 13 = 513
Grades 3 Math - Elementary School - Addition and Subtraction (Decimals)
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10 Questions

1. 2.3 + 5.6 + 12.3 = ?
2. 8.8 - 6.4 - 8.8 + 19.6 = ?
3. 128.7 + 450.3 - 15.2 + 200 = ?
4. 128.7 + 450.3 - 15.2 + 200 = ?
5. 23.5 - 14.9 + 146.2 = ?
6. 345.9 + 38.6 - 17.2 = ?
7. 120.3 + 23.4 + 8.6 = ?
8. 678.1 - 345.2 = ?
9. 120.3 + 23.4 + 8.6 = ?
10. 69.9 - 40.6 + 123.4 = ?

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