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Subtraction Across Zeroes By Jamie Unverzagt
Hundreds Tens Ones Let’s model 102 minus 38. Begin by showing 102.
Hundreds Tens Ones If you have 2 ones, can you take away 8 ones?
Hundreds Tens Ones How can you get more ones? There are no tens to trade!
Hundreds Tens Ones How many tens are in a hundred?
Hundreds Tens Ones Hundred is the same as 10 tens! Good thinking!
Hundreds Tens Ones Now can you get more ones?
Hundreds Tens Ones How many tens and ones now? 912
Hundreds Tens Ones What’s the next step? How many ones are left?
Hundreds Tens Ones What’s the next step? How many tens are left? 6
Hundreds Tens Ones Let’s model 203 minus 57. Begin by showing 203.
Hundreds Tens Ones If you have 3 ones, can you take 7 ones away?
Hundreds Tens Ones If 10 tens are in one hundred, how many tens are in two hundreds? 10 tens + 10 tens = 20 tens
Hundreds Tens Ones Can you trade one of the 20 tens for ones? How many tens are left? 20 tens- 1 ten = 19 tens
Hundreds Tens Ones That’s 19 tens left 19 tens 19 which is the same as 1 hundred and 9 tens.
Hundreds Tens Ones How many ones do you have now? 1913
Hundreds Tens Ones What is 13 ones minus 7 ones?
Hundreds Tens Ones Finish subtracting You’ve Got It!
Subtract Across Zeroes
Subtract Across Zeroes
Subtract Across Zeroes Slow Down! Don’t regroup if you don’t have to!
Subtract Across Zeroes
Ms. Miles & Ms. Connelly Subtraction With Regrouping.
Subtraction with Base 10 Models Created by Jamie Unverzagt.
25 seconds left….. 24 seconds left….. 23 seconds left…..
Take from Ten First Subtraction Strategy -9 Click on a number below to go directly to that type of subtraction problems
ORDER OF OPERATIONS Parentheses 2. Exponents 3. Multiplication or division (in order from left to right) 4. Addition or subtraction (in order.
Where do we start? Top right 4 ones minus 7 ones Can’t do it! Take one ten away Tens place 2 Where do we get more ones? 1 ten + 4 ones = 14 ones.
Let’s take a 15 minute break Please be back on time.
Addition 1’s to
Adding Up In Chunks. Category 1 Adding multiples of ten to any number.
PARTIAL SUMS ADDITION THINK HOW MANY PARTS?? (The largest number has 3 digits so there will be 3 parts.) WORK LEFT TO RIGHT…ADD THE COLUMNS.
…..to our THIRD GRADE MATH CLASS! This PowerPoint was developed by Jessica Kresky and her Third Grade Team.
SUBTRACTING INTEGERS 1. CHANGE THE SUBTRACTION SIGN TO ADDITION 2. TAKE THE INVERSE OF THE SECOND NUMBER 3. FOLLOW THE RULES FOR ADDITION 4. ADD THE OPPOSITE.
Addition Facts = = =
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Time for a BREAK! You have 45 Minutes. Time Left 44.
WEEK 1 You have 10 seconds to name…
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We will resume in: 25 Minutes We will resume in: 24 Minutes.
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Don’t Subtract Add I am learning that problems like 34 + ? = 51 and 51 – 34 = ? have the same answer. e.g = 51 and 51 – 34 = 17.
A Subtraction Algorithm. Trade First “The Trade First algorithm resembles the traditional method of subtraction, except that all the trading is done before.
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MODE MODE Mode Mode = the item that appears most often - the most common number In this group of fruit APPLES are the MODE. There are more apples than.
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Wednesday, October 9, 2013 Continue working on your math club assignments.
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