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Module 3 Lesson 6 Objective • Write base ten numbers in expanded form Warm up • Write 832 in place value and unit form • 8 hundreds • 3 tens • 2 ones 832 800 30 2 Meter strip addition Rules: Drag your finger from zero to 27cm. Then slide up 35 more centimeters. You might first skip-count by ten three times, then go up 5 ones. Count up • If I say 324 you say 3 hundreds 2 tens and 4 ones • Let’s give it a try • 398 • 890 • 174 • Timmy the Monkey picked 46 bananas from the tree. When he was done, there were 50 bananas left. How many bananas were on the tree at first? • Close your eyes and visualize Timmy and all of the bananas. • Whisper to your partner what you could draw to show what you see. • What is the question asking? Reread. • Share your thinking • Is there another way to solve it? • Timmy the Monkey picked 46 bananas from the tree. When he was done, there were 50 bananas left. How many bananas were on the tree at first? • The tree had 96 bananas before Timmy picked them. Expanded form in Unit Order Hundreds Tens Ones 2 4 3 100 100 10 10 10 10 1 1 1 • Read this number to me in unit forms. • 2 hundreds • 4 tens • 3 ones • Great! • Let’s count to 243 in bundles Expanded form in Unit Order • Each time we Hundreds Tens Ones • Explain to your count a new unit, neighbor whyit we are adding this is the to what wesame had as 243 before. 100 +100 +10 +10+10 +10+1+1 +1 •• Let’s add this Let’s reread together with addition symbols 2 200 4 + 40 3 + 3 = Let’s add the total of each unit Hundreds Tens Ones 2 4 3 200 + 40 + 3= 243 Now again give me the addition sentence that adds up the total of each unit. What happens if we move the units around? +1+1+1 +100+100 10+10+10+10 243 100+100 + 10+10+10+10 + 1+1+1= 243 40 + 3 + 200 = 243 Can someone explain what they understand about the order of the units and the total value? Review • What is 2+4+3? • What is 3+4+2? • Explain to your neighbors why these totals are equal. • When you add it doesn’t matter if the parts are switched around. So 2+4+3 = 3+4+2 And 200+40+3 = 3+40+200 Now you do it! • Practice the Skills we just learned in your problem set. • Rotate for your math groups to practice skills more math skills.