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Use place value understanding and properties of operations to perform multi- digit arithmetic.
MGSE3.NBT.1 Use place value understanding to round whole numbers to the nearest 10 or 100.
- about
- estimate
MGSE3.NBT.2 Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects.
MGSE3.MD.1 Tell and write time to the nearest minute and measure elapsed time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram, drawing a pictorial representation on a clock face, etc.
TimePoster.pdfStudents can solve elapsed time word problems by using the BED strategy:
1. Identify the Beginning time (B), End time (E), and the Duration (or elapsed time-D).
2. Decide which component is unknown.
3. Use a number line to help you find it.
MGSE3.MD.2 Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l). Add, subtract, multiply, or divide to solve one-step word problems involving masses or volumes that are given in the same units, e.g., by using drawings (such as a beaker with a measurement scale) to represent the problem.
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