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Grade 5 Module 1 Lesson 13PowerPoint Presentation

Grade 5 Module 1 Lesson 13

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Grade 5 Module 1 Lesson 13

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Grade 5 Module 1 Lesson 13

4 x 3 =

(Say the multiplication sentence in unit form)

4 x 3 =

(Say the multiplication sentence in unit form)

4 x 3 ones = 12 ones

4 x 0.2 =

(Say the multiplication sentence in unit form)

4 x 0.2 =

(Say the multiplication sentence in unit form)

4 x 2 tenths = 8 tenths

4 x 3.2 =

(Say the multiplication sentence in unit form)

4 x 3.2 =

(Say the multiplication sentence in unit form)

4 x 3 ones 2 tenths = 12.8

Write the multiplication sentence

4 x 3.2 =

(Say the multiplication sentence in unit form)

4 x 3 ones 2 tenths = 12.8

Write the multiplication sentence

4 x 3.2 = 12.8

13.78 ___ 13.86

(On your personal white boards, compare the numbers using the greater than, less than, or equal sign.)

13.78 ___ 13.86

(On your personal white boards, compare the numbers using the greater than, less than, or equal sign.)

13.78 < 13.86

0.78 ___ 78/100

(On your personal white boards, compare the numbers using the greater than, less than, or equal sign.)

0.78 ___ 78/100

0.78 = 78/100

439.3 ___ 4.39

439.3 ___ 4.39

439.3 > 4.39

5.08 ___ fifty-eight tenths

5.08 ___ fifty-eight tenths

5.08 < fifty-eight tenths

5.08 ___ fifty-eight tenths

5.08 < fifty-eight tenths

Because fifty-eight tenths = 5 and 8 tenths (5.8). Remember that 10 tenths = 1 one (or 1 whole), so 50 tenths = 5 ones (or 5 wholes)

Louis buys 4 chocolates. Each chocolate costs $2.35. Louis multiplies 4 x 235 and gets 940. Place the decimal to show the cost of chocolates and explain your reasoning using words, numbers, and pictures

0.9 ÷ 3 =

Show 9 tenths with your disks

0.9 ÷ 3 =

Show 9 tenths with your disks

Divide 9 tenths into 3 equal groups.

How many tenths are in each group?

0.9 ÷ 3 =

Show 9 tenths with your disks

Divide 9 tenths into 3 equal groups.

How many tenths are in each group?

There are 3 tenths in each group.

0.9 ÷ 3 = 0.3

(Read the number sentence using unit form.)

0.9 ÷ 3 = 0.3

(Read the number sentence using unit form.)

9 tenths divided by 3 equals 3 tenths.

How does unit form help us divide?

9 tenths divided by 3 equals 3 tenths.

How does unit form help us divide?

When we identify the units, then it’s just like dividing 9 apples into 3 groups. If you know what unit you are sharing, then it’s just like whole number division. You can just think about the basic fact.

3 groups of __________ = 0.9

(What is the missing number in our equation?

3 groups of __________ = 0.9

(What is the missing number in our equation?

3 tenths (0.3)

Show 24 hundredths with your disks

Show 24 hundredths with your disks

Divide 24 hundredths into 3 equal groups.

How many hundredths are in each group?

Show 24 hundredths with your disks

Divide 24 hundredths into 3 equal groups.

How many hundredths are in each group?

There are 8 hundredths in each group.

0.24 ÷ 3 = 0.08

(Read the number sentence using unit form.)

0.24 ÷ 3 = 0.08

(Read the number sentence using unit form.)

24 hundredths divided by 3 equals 8 hundredths

How does unit form help us divide?

24 hundredths divided by 3 equals 8 hundredths.

How does unit form help us divide?

When we identify the units, then it’s just like dividing 24 apples into 3 groups. If you know what unit you are sharing, then it’s just like whole number division. You can just think about the basic fact.

3 groups of ________ = 0.24

(What is the missing number in our equation?)

3 groups of ________ = 0.24

(What is the missing number in our equation?)

8 hundredths (0.08)

1.5 ÷ 5 = _____

(Read the equation using unit form.)

1.5 ÷ 5 = _____

(Read the equation using unit form.)

One and 5 tenths divided by 5

Or

15 tenths divided by 5

What is useful about reading the decimal as 15 tenths?

1.5 ÷ 5 = _____

(Read the equation using unit form.)

One and 5 tenths divided by 5

Or

15 tenths divided by 5

What is useful about reading the decimal as 15 tenths?

When you say the unit, it’s like basic math.

What is 15 tenths divided by 5?

What is 15 tenths divided by 5?

3 tenths

What is 15 tenths divided by 5?

3 tenths

1.5 ÷ 5 = 0.3

1.05 ÷ 5 = ______

(Read the equation using unit form.)

1.05 ÷ 5 = ______

(Read the equation using unit form.)

105 hundredths divided by 5

1.05 ÷ 5 = ______

(Read the equation using unit form.)

105 hundredths divided by 5

Is there another way to decompose this quantity (1.05)?

Is there another way to decompose this quantity (1.05)?

1 one and 5 hundredths

10 tenths and 5 hundredths

105 hundredths divided by 5 (original)

Is there another way to decompose this quantity (1.05)?

1 one and 5 hundredths

10 tenths and 5 hundredths

105 hundredths divided by 5 (original)

Which way of naming 1.05 is most useful when dividing by 5? Why? (Turn and talk. Then solve)

1 one and 5 hundredths

10 tenths and 5 hundredths

105 hundredths divided by 5 (original)

Which way of naming 1.05 is most useful when dividing by 5? Why? (Turn and talk. Then solve)

10 tenths and 5 hundredths because they are both multiples of 5. This makes it easy to use basic facts and divide mentally.

1 one and 5 hundredths

10 tenths and 5 hundredths

105 hundredths divided by 5 (original)

Which way of naming 1.05 is most useful when dividing by 5? Why? (Turn and talk. Then solve)

10 tenths and 5 hundredths because they are both multiples of 5. This makes it easy to use basic facts and divide mentally. The answer is 2 tenths and 1 hundredth.

1 one and 5 hundredths

10 tenths and 5 hundredths

105 hundredths divided by 5 (original)

Which way of naming 1.05 is most useful when dividing by 5? Why? (Turn and talk. Then solve)

105 hundredths is easier for me because I know 100 is 20 fives so 105 is 1 more, or 21. 21 hundredths.

1 one and 5 hundredths

10 tenths and 5 hundredths

105 hundredths divided by 5 (original)

Which way of naming 1.05 is most useful when dividing by 5? Why? (Turn and talk. Then solve)

I just used the algorithm from Grade 4 and got 21 and knew it was hundredths.

10 minutes to solve, trying your personal best to complete the problem set.