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# 2.2: Estimate Sums and Differences Using Front-End Estimation

Difficulty Level: At Grade Created by: CK-12

Credit: dying_grotesque

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Find each estimate by using front-end estimation.

1. 45.67+3.04=\begin{align*}45.67 + 3.04 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
2. 55.10+5.6=\begin{align*}55.10 + 5.6 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
3. 88.992.10=\begin{align*}88.99 - 2.10 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
4. 80.0912.78=\begin{align*}80.09 - 12.78 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
5. 34.753.05=\begin{align*}34.75 - 3.05 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
6. 5.67+3.87=\begin{align*}5.67 + 3.87 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
7. 235.56120.45=\begin{align*}235.56 - 120.45 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
8. 17.8+12.3+5.3=\begin{align*}17.8 + 12.3 + 5.3 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
9. 33.1+11.4+2.8=\begin{align*}33.1 + 11.4 + 2.8 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
10. 18.11+25.4+2.1=\begin{align*}18.11 + 25.4 + 2.1 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
11. 34.110.123=\begin{align*}34.1 - 10.123= \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
12. 301.110.2345=\begin{align*}301.1 - 10.2345 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
13. 12.234+15.1004=\begin{align*}12.234 + 15.1004 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
14. 2.00987+5.0123+8.118=\begin{align*}2.00987 + 5.0123 + 8.118 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}
15. 3.00451.0008=\begin{align*}3.0045 - 1.0008 = \underline{\;\;\;\;\;\;\;\;\;\;}\end{align*}

## Date Created:

Aug 10, 2015

Nov 20, 2015
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