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Subtracting Decimals UW.5.M.NBT.07 Add, subtract, multiply, and divide decimals to hundredths using concrete models or drawing and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used Essential Questions • 1. What are decimal numbers? How do we subtract decimals? • 2. What is place value to the thousandths? How does the place value of a number effect its value? Objective •I can subtract decimals to the thousandths place using models or drawing Subtracting Decimals is as easy as 1..2..3... 1. Line up the decimals! 2. Fill in the blank spots with zeros! 3. Subtract like normal 4.Bring down the decimal! Watch.... • How about..... • When you don’t see the decimal it is invisible and you find it behind the whole number. Therefore, • 6. - 2.3 6 - 2.3 6. 2.3 • 2) Then fill in the empty spots with zero (have to make the teams even or it’s not fair!) 6.0 -2.3 • 3) Then subtract! 3.7 • 1) Line ‘em up! 6.0 2.3 LEts do one together... • 4.032 - 2.39 Now You Try.... • 5.64 - 4 Now You Try with your partner • 9.20 - 3.491 Subtracting With Models using more models Now You Try Using Models or drawing a picture.... • 12.3 - 4.502 Now You Try with a partner with drawing a model.... • 50.321 - 4.2 • Think... Closure what are the steps for subtracting decimals? • How are they similar to addition? • Share with your face partner • Please rewrite the objective for today on you whiteboard Independent Practice • 3.45 - .568 • 57.89 - .00567 • 2.09 - .0045 • 306.09 - .75 • 12.009 - 7.90 • 1.00005 - .998 • 2.05 - .00902 • 3.0079 - 2.98