

Decimals
Presentation
•
Mathematics
•
3rd - 4th Grade
•
Easy
+1
Standards-aligned
Susan Short
Used 23+ times
FREE Resource
16 Slides • 30 Questions
1
Decimals
How are decimals and place value related?

2
Review
How are tenths and hundredths the same? They have a specific place in the place value chart. The tenths are always to the right of the decimal point. The hundredths are always to the right of the tenths.
How are tenths and hundredths different? They have different values. The tenths place is ten times smaller than one and can be made with a fraction over 10. The hundredths place is 100 times smaller than one and can be made with a fraction over 100.
3
Reading and Writing Decimals
Knowing and looking at the place value of every digit is very important. You must know this to read and write numbers with decimals.
Say the whole number.
Say "and" for the decimal.
Say the number after the decimal.
Say the place value of the last digit.
4
Reading and Writing Decimals
2.13 = two and thirteen hundredths
The last digit of 3 is in the hundredths place.
1.5 = one and five tenths
The last digit of 5 is in the tenths place.
5
Write Decimals as Fractions
The number of decimal digits indicates the number of zeros in the denominator.
If you have one decimal digit, there is one 0 in the denominator. 0.6 = 6/10
If you have two decimal digits. there are two 0's in the denominator. 0.06 = 6/100
6
7
Exploring Decimals
13 hundredths
0.07
8
Exploring Decimals
13 hundredths
0.07
10 hundredths
4 tenths, 9 hundredths
0.52
8/100
9
Multiple Choice
Write 5.08 as a mixed number.
5 51
5 108
5 1008
5 10058
10
Explanation Slide...
Write 5.08 as a mixed number.
5 is a whole number in the ones place. The 8 is in the hundredths place so the 8 is over 100.
11
Multiple Choice
Write 7 10023 as a decimal.
.0723
.723
7.23
72.3
12
Explanation Slide...
13
Multiple Choice
What is the place value of the digit 9 in 4.92
ones
tens
tenths
hundredths
14
Multiple Choice
What does this represent if written as a decimal?
0.37
0.037
3.7
37
15
Explanation Slide...
The picture shows 37 cubes out of 100 colored in, so the 7 should be in the hundredths place.
16
Multiple Choice
What does this represent if written as a decimal?
0.79
0.079
7.9
79
17
Explanation Slide...
The picture shows 79 cubes out of 100 colored in, so the 9 should be in the hundredths place.
18
Multiple Choice
What does this represent if written in words?
seventy-nine hundredths
seventy-nine thousandths
seven and nine tenths
seventy-nine
19
Multiple Choice
What does this represent if written as a decimal?
1.15
11.5
0.15
0.115
20
Explanation Slide...
There is one whole colored in and 15 out of 100 colored in, so the the 5 needs to be in the 100ths place and the answer is 1.15
21
Multiple Choice
If the flat is 1 whole then what does this represent if written in words?
seven tenths
seven hundredths
seven thousandths
seven
22
Multiple Choice
If the flat is 1 whole, what does this represent if written as a decimal?
0.7
0.07
0.007
7
23
Explanation Slide...
There are 7 cubes colored in out of 100, so the 7 needs to be in the hundredths place.
24
Multiple Choice
What does this represent if written in words?
twenty-three hundredths
twenty-three thousandths
two and three tenths
twenty-three
25
Multiple Choice
What does this represent if written as a decimal?
0.23
0.023
2.3
23
26
Explanation Slide...
The 1 whole is divided into 100 equal parts and 23 out of 100 are colored, so the 3 must be in the hundredths place.
27
Multiple Choice
What does this represent if written as a decimal?
0.04
0.4
0.004
4
28
Explanation Slide...
The 1 whole is divided into 100 equal parts and 4 out of 100 are colored, so the 4 must be in the hundredths place.
29
Multiple Choice
If the flat is the 1 whole, what does this represent if written in words?
four and sixty-five hundredths
four hundred sixty five thousandths
four hundred sixty five
sixty five
30
Multiple Choice
If the flat is the 1 whole, what does this represent if written as a decimal?
4.65
0.465
465
46.5
31
Multiple Choice
What is the place value of the digit 9 in 4.92
ones
tens
tenths
hundredths
32
Multiple Choice
What is the place value of the digit 4 in 7.24
tens
tenths
hundreds
hundredths
33
Multiple Choice
What does this represent if written as a decimal?
0.37
0.037
3.7
37
34
Multiple Choice
What does this represent if written as a decimal?
0.23
0.023
2.3
23
35
Multiple Choice
What does this represent if written as a decimal?
0.7
0.07
0.007
7
36
Multiple Choice
What does this represent if written as a decimal?
0.79
0.079
7.9
79
37
Multiple Choice
What does this represent if written as a decimal?
1.15
11.5
0.15
0.115
38
Multiple Choice
What does this represent if written as a decimal?
4.65
0.465
465
46.5
39
Multiple Choice
What does this represent if written in words?
four and sixty five hundredths
four hundred sixty five thousandths
four hundred sixty five
sixty five
40
Multiple Choice
What does this represent if written in words?
twenty three hundredths
twenty three thousandths
two and three tenths
twenty three
41
Multiple Choice
What does this represent if written in words?
seven tenths
seven hundredths
seven thousandths
seven
42
Multiple Choice
What does this represent if written in words?
seventy nine hundredths
seventy nine thousandths
seven and nine tenths
seventy nine
43
Multiple Choice
Write 7 10023 as a decimal.
.0723
.723
7.23
72.3
44
Multiple Choice
Write 5.08 as a mixed number.
5 51
5 108
5 1008
5 10058
45
Multiple Choice
What is the place value of the digit 4 in 7.24
tens
tenths
hundreds
hundredths
46
Poll
How do you feel about decimals, fractions, and mixed numbers? Choose the best one for you.
I do not understand.
I understand sometimes, but have some questions.
I understand pretty well.
I completely understand.
Decimals
How are decimals and place value related?

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