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Decimal Place Value with Base Ten Blocks and Grids. Base Ten Pieces. Units = ones Rods = tens Flat = hundreds. Use rods to cover a flat. How many rods did you use to cover the flat? If a flat represents 1 whole, then what fraction does one rod represent?
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Base Ten Pieces • Units = ones • Rods = tens • Flat = hundreds
Use rods to cover a flat • How many rods did you use to cover the flat? • If a flat represents 1 whole, then what fraction does one rod represent? • What fraction of the flat is 7 rods? • What fraction of the flat is 4 rods?
What decimal number is represented by 10 rods? • What decimal number is represented by 1 flat and 5 rods? • How many tenths are in two wholes? • How would you write 20 tenths using decimal notation? • How many small squares are in a flat?
Which base ten piece would you use to show one hundredth? Why? • How many hundredths does a rod represent? • How would you write 10 hundredths using decimal notation? • Do 0.10 and 0.1 represent the same number? • Explain why 0.10 and 0.1 represent the same number using the base ten blocks.
Write the number that represents 3 flats, 5 rods, and 7 units using decimal notation. 3.57 Write the number that represents 2 flats, 4 rods, and 1 unit using decimal notation. 2.41
Arrange your base ten blocks to show 2.34 Arrange your base ten blocks to show 1.05
Find sheet “Day 14 Base Ten Grids” Find Grid A • How many small squares are on this grid? • What fraction of the grid does each small square represent? • What is the decimal representation for each small square? • What is the decimal representation for each row or each column? • Shade 2 columns and 4 small squares, what decimal have we represented?
Find in your notebook, “Day 14, Blank Base Ten Grids A” Use the Blank Grids to shade each of the following decimals!! Example: 1.82 – You would shade one whole grid PLUS 8 columns and 2 squares 1.05 0.84 2.57 0.04 1.97 2.67
Find sheet “Day 14 Base Ten Grids” AGAIN Look at Grid B • How many tiny rectangles are on this grid? • What fraction of the grid does each tiny rectangle represent? • How do you think we might represent this number using decimal notation? • What do you think this place value is called? Why? • Shade 2 rows, 8 small squares, and 9 tiny rectangles, what decimal have I represented?
Find in your notebook, “Day 14, Blank Base Ten Grids B” Use the Blank Grids to shade each of the following decimals!! Example: 1.823 – You would shade one whole grid PLUS 8 rows, 2 small squares, and 3 tiny rectangles 0.647 1.437 2.418 1.503 0.749 2.376
Homework :) Day 14, “Decimal Place Value Practice