Estimating the Sum of Decimals up to Two Decimal Places

Round decimals and estimate the sum. Compare the estimate to the precise sum in this activity.
Putting It All Together
[i]Answer these open ended questions on your own or with others to form deeper math connections. [/i]
When would you round a number with a decimal to the benchmark values shown on the number line above?[br]
Why does rounding to these benchmark values make it easier to add decimals?
Close

Information: Estimating the Sum of Decimals up to Two Decimal Places