Comparing Decimal Estimates at Different Place Values
Comparing Decimal Estimates at Different Place Values
Observe how choosing a rounding place value shapes the estimate of a decimal sum or difference.
Putting It All Together
Answer these open ended questions on your own or with others to form deeper math connections.
Question ouverte 1
How can you tell if your mental calculation is reasonable? How can estimation help you check your answer?
Entrée de texte et de données mathématiques
Question ouverte 2
Marcus and Mike ran 100 m in 12.27 seconds and 12.33 seconds respectively. Can you tell who won the race if you round their times to tenths of seconds? Explain your reasoning.
Entrée de texte et de données mathématiques