Obtain an estimate for the following computation by rounding the numbers so that the resulting arithmetic can easily be performed by hand or in your head. Then, use a calculator to perform the computation. How reasonable is your estimate when compared to the actual answer? \( 7.78+1.12+11.33 \) Round each number to the nearest integer. An estimate of the sum is

Eric walks 2.75 miles to and from work everyday for an entire year. How many miles did he walk?

Marie has 231 toothpicks in one box and 175 toothpicks in another box. She uses 319 toothpicks to make a bridge. How many toothpicks does she have left?

2. Invéntate dos situaciones diferentes que se resuelvan con la resta 51 - 24 . Resuelve una por descomposición y otra mediante saltos en la línea numérica.

2rrange the three numbers hown from least to greatest. \[ \frac{2}{5}, \frac{6}{10}, \frac{2}{9} \]

4. Which list is ordered from least to greatest? \( \frac{1}{9}, \frac{3}{9}, \frac{7}{9} \) \( \frac{7}{9}, \frac{1}{9}, \frac{3}{9} \) \( \frac{3}{9}, \frac{7}{9}, \frac{1}{9} \) \( \frac{7}{9}, \frac{3}{9}, \frac{1}{9} \)