Adding Decimals (positive)
Presentation
•
Mathematics
•
6th - 8th Grade
•
Practice Problem
•
Hard
Ruth Manzella
FREE Resource
30 Slides • 26 Questions
1
2
3
4
Open Ended
What are the names of each place value before and after the decimal point? Please write the place value above each number.
5
6
7
Multiple Choice
Which of the following is the correct place value for the digit 9 in the number 4567.8901?
Hundredths
Tenths
Thousandths
Ones
8
9
10
11
Fill in the Blanks
Fill in the blank: In the number 7345.023, the digit 2 is in the
12
13
Multiple Choice
Based on the place value chart, what is the value of the digit 3 in the number 7345.023?
300
0.03
3,000
0.003
14
15
16
17
Multiple Choice
Which of the following addition or subtraction problems is solved incorrectly?
5,634 + 210 = 5,844
1234 + 1 = 1334
345 - 2 = 343
1,345 - 2 = 1,325
18
19
20
Open Ended
Based on the examples we just looked at, what do you think we need to do to make sure we are adding/subtracting decimals correctly?
21
Open Ended
Write the number 43.681 in word form.
22
23
24
Multiple Choice
Which of the following statements best explains why the problem 1234 + 1 = 1334 is incorrect?
The numbers were not lined up by place value.
The addition was done from left to right.
The decimal points were not lined up.
The answer is correct.
25
Multiple Choice
Which of the following is the correct standard form for 'Six thousand twenty-nine and forty-four thousandths'?
6029.044
6029.44
6029.0044
6029.00044
26
27
28
Fill in the Blanks
Fill in the blank: When adding decimals, always line up the
Type answer...
29
30
Multiple Choice
When adding decimals, what is the most important step to ensure accuracy?
Line up the decimal points
Add from left to right
Ignore the decimal points
Estimate the answer first
31
32
33
34
Multiple Choice
What is the sum of 31.45 and 6.2 when the decimals are lined up correctly?
37.65
37.45
37.55
36.65
35
36
37
38
Open Ended
Explain why it is important to line up the decimal points when adding numbers with decimals.
39
40
Fill in the Blanks
The sum of 304 and 22.78 is
Type answer...
41
42
Multiple Choice
When adding decimals, what is the most important step to ensure the numbers are added correctly?
Line up the decimal points
Add the numbers from left to right
Ignore the decimal points
Start with the largest number
43
44
45
46
Multiple Choice
What is the sum of 345.987 and 27.4?
373.387
373.397
373.287
372.387
47
Open Ended
After learning about adding decimals, what questions do you still have or what would you like to know more about?
48
Open Ended
What is one important step you learned about adding decimals that helps you avoid mistakes?
49
Fill in the Blanks
The digit in the hundredths place of the sum 695.93 + 42.38 is
Type answer...
50
Multiple Select
Which of the following are correct steps when adding 695.93 and 42.38 using a place value grid?
Align the decimal points
Add digits from right to left
Ignore the decimal points
Fill empty places with zeros
51
Open Ended
Why is it important to line up the decimal points when adding or subtracting decimals?
52
Multiple Choice
What is the sum of 1,238.4 and 22.15 when you line up the place values correctly?
1,260.55
1,216.25
1,260.25
1,216.55
53
Multiple Select
Select all the correct steps to add 23.8 and 5.
Line up the decimal points
Add the numbers as whole numbers
Write the decimal point in the answer directly below the other decimal points
Ignore the decimal point and add normally
54
Multiple Choice
Which of the following is the correct sum of 12.34 and 1.456?
13.796
13.800
13.790
13.900
55
Fill in the Blanks
17.07 +
Type answer...
56
Open Ended
Explain how you would add 73.8 and 569, and why lining up the decimal point is important in this calculation.
Show answer
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