MA 137 Lesson 7, 8, 9 Notes
MA 137 Lesson 7, 8, 9 Notes MA 137
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This 4 page Class Notes was uploaded by Danielle Gilbert on Thursday February 5, 2015. The Class Notes belongs to MA 137 at Purdue University taught by Renee Figueroa in Spring2015. Since its upload, it has received 171 views. For similar materials see Math for Elementary Teachers in Math at Purdue University.
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Date Created: 02/05/15
MATH 137 LESSON 7 SECTION 31 MAKING LABELED DIAGRAMS TO ORGANIZE AND CLARIFY INFORMATION Jim is 15 cm taller than Sam This difference is 5 times as great as the difference between Abe39s and Sam39s heights What is the difference between Abe39s and Sam39s heights When comparing people39s heights vertical pictures are helpful 350M ISCM Jim Sam Abe 155 3cm difference MATH 137 LESSON 8 SECTION 32 WAYS OF THINKING ABOUT ADDITION AND SUBTRACTION Important De nitions 0 addends numbers added together sum number that is the result oF an addition problem diFFerence when one number is subtracted From another minuend number From which the other is subtracted subtrahend number being subtracted Different types oF additionsubtraction 0 Missing addend represented by ab It suggests addition but the mussing value is ba 0 Take Away One quantity is moved to separated From the larger quantity 0 Comparison comparing one thing or person to another 0 Additive combination 0 Physical adding two oF the same things chairschairs how many chairs 0 Conceptual adding two things together that aren39t the same exact things chairstables how much Furniture 0 Discrete problem nontouching separate objects that can be measured Can be represented with pictures or macaroni 0 Continuous problem Can be measured only by length area etc Measured NOT counted Cannot be represented by macaroni Minuend subtrahend diFFerence 1 Katie had 5 CD39s She bought 2 more How many CD39s does she have now A Additive Combination physical mum E 2 The school room has 8 chairs and 4 tables How many pieces oF Furniture are in the room A Additive Combination concetual 3 Kelsey has 10 math problems For homework She has done 4 so Far How many more does she need to do to nish her homework A Missing addend 4 Jacob has 9 pencils Jared has 6 Jacob brags that he has more How many more does Jacob have A Comparison 5 Sarah has 12 pennies but 3 Fell out of her pocket How many does she have now A Takeaway 6 Amandas school is 34 km away From her house She has walked 125km rowards school How much Fur rher does she need to walk A Missing Addend B Con rinuous MATH 137 LESSON 9 SECTION 33 The main thing to get From this lesson is that students may not do the math the exact way you taught them However you have to take other ways into consideration and look at their work IF it mathematically makes sense you cannot count it wrong or it will confuse the student and may discourage them One way to do this is to try taking a students problem changing the numbers and see iF their math makes sense IF yes then it should be correct Empty number line Empty number lines take your math work and puts it on a number line IF you are adding begin the number line at the start oF the line When subtracting start at the end oF the number line or
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