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- Estimate to tell if each answer is reasonable. Explain your reasoning.
- 0.8 + 0.7 = .15
- 12.8 + 6.7 = 73.8
- 15.20 + 2.50 = 17.007
- 3.706 − 1.597 = .2289
- 0.6 + 0.06 = 0.12
- 1.78 − .99 = .79
- 0.07 + 0.004 = 0.074
- 0.01 + 0.10 = 0.0110
- Solve the problems. Estimate to see if your answers are reasonable.
- 3.1 + 0.13
- 1.05 + .50
- 0.379 + 0.347
- 80.23 − 22.58
- 13.89 − 5.53
- 1.7 + 8.62
- 0.9 − 0.64
- 1.3 + 0.678
- 42.34 + 87.9
- 1.03 − 0.99
- Use <, >, or = to make the number sentences true.
- 0.2 + 2.2
2.2 + .002 - 0.25 + 0.25 0.025 + 2
- 0.025 + 0.025 .0250 + .0250
- 2.25 + .025 2.25 + .200
- 0.025 + 0.10 0.2 + 0.1