Front-End Estimation Study Guide
- Identify the numbers you want to estimate.
- Look at the front digits of the numbers (usually the hundreds place).
- Add or subtract the front digits, depending on whether you are estimating a sum or difference.
- Add any remaining digits to the front digit sum.
- Compare your estimated result with the exact calculation to see how close you are.
◂Math Worksheets and Study Guides Third Grade. Number Words to 1,000
Study Guide
Number Words to 1,000 
Worksheet/Answer key
Number Words to 1,000 Worksheet/Answer key
Number Words to 1,000 Worksheet/Answer key
Number Words to 1,000
Worksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyThe resources above cover the following skills:
Algebra (NCTM)
Use mathematical models to represent and understand quantitative relationships.
Model problem situations with objects and use representations such as graphs, tables, and equations to draw conclusions.