Module 3 Lesson 1. Meter Strip Subtraction Rules: Drag your finger from zero to the number I say. Then subtract 10 from the amount. 50cm. 85cm. 49cm.

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Presentation transcript:

Module 3 Lesson 1

Meter Strip Subtraction Rules: Drag your finger from zero to the number I say. Then subtract 10 from the amount. 50cm. 85cm. 49cm.

Meter Strip Subtraction Rules: Drag your finger from zero to the number I say. Then subtract 20 from the amount. 65cm. 32cm. 78cm.

Meter Strip Subtraction Rules: Drag your finger from zero to the number I say. Then subtract ___ from the amount. 36cm. 78cm. 93cm.

Skip Count Up and Down Skip count by fives starting with zero

Skip Count Up and Down Skip count by fives starting with zero 00 60

Think about it! With your partner, compare the meter strip to the clock. How are they the same? How are they different? Do we use both tools to measure? I used a ribbon to make our clock. What would happen if I moved it back into a horizontal line so that it looked more like a meter strip? Could I still use it to measure the length of time?

Happy Counting Let’s count by ones, starting at 95. Ready? This time, let’s skip-count by tens starting at 60. Ready?

The next slides are a review of the Teacher Activity of Bundling

How many straws do you think there might be?

How can we group these to find the amount? We can count by ones, twos, fives, or tens! Which method would be most efficient?

Why is it easier to count by 10’s than 2’s,and 5’s?

How many groups of ten will we need to make 100? 10 tens makes 100

Let’s count our tens 1 ten 2 ten 3 ten 4 ten 5 ten 6 ten 7 ten 8 ten 9 ten 10 ten

Let’s count our tens by 10’s

Review What is the value of 10 tens? 100 or 1 hundred How many straws equal 1 ten? 10 straws How many straws are in 10 tens? 100 straws

Review 10 = 1 ten 100 = 10 tens 1000 = 100 tens

Place Value Each number has its own place value When you group things in bundles of hundreds and tens you might have some left over, so they need to be placed in the right unit Ones tensHundreds

Practice Lets bundle our straws! Remember to make bundles of 10 straws first. If you have 10 groups of ten, bundle it into a hundred!

Practice Lets find out how many straws each group has. How many hundreds do we need to make 1 thousand? Lets make 1 thousand by combining our bundles!

Place Value Which unit is the smallest? Which unit is the biggest? Ones TensHundreds Thousands

Place Value Sometimes its hard to count using thousands of straws on your desk So what can we do to show value in the units without having so many straws? Draw them What is the value of this number? Ones TensHundreds 3 2 4

Let’s try some more Ones Tens Hundreds

Let’s try some more Ones TensHundreds

Let’s try some more Ones TensHundreds