Rounding
Round 12.167 to the nearest tenths place.
What is 12.2 OR 12.200
2 tenths.
.52 - .13
What is: 0.39
0.5 + 0.6
0.4 x 0.7
What is 0.28 (28 hundredths)
Find the value of
1 divide 0.1
What is: 10
There are 10 0.1 in 1 whole
Put the following in order of least to greatest:
0.01, 0.1, 0.001
least - 0.001 (1 thousandth), 0.01 (1 hundredth), 0.1 (1 tenth)
Which way do you move the decimal point to multiply times 10.
Round 1.493 to the nearest hundredths place.
What is 1.49
One and 49 hundredths.
12.54- 3.76
8.78
13.74 + 105.63
119.37
8 x 0.07
0.56
Find the value of
3 divide 0.02
What is: 150
Two hundredths goes into 3 wholes 150 times.
Write 13. 015 in expanded form
(1x10) + (3x1) + (1 x 0.01) + (5 x 0.001)
the decimals could also be written as fractions.
In which number does the 7 represent 1/10 the value of the 7 in 17.4
a- 5
b- 179
c-10.7
d-17.9
C
What are the rules for rounding?
Provide an example.
The next place value to the right tells you what to do
If the value is above 5 the number in the place you are rounding to will increase
If the value is below 5 the number in the place you are rounding to will stay them same.
637. 3 - 374.74
262.56
Describe how to solve the problem
2.78 + 12.28
You will line up the place values so the decimal are lined up.
8 + 8 = 16 (leave the 6 regroup the 1 to the next place value)
2 + 7 (+1) = 10 (leave the zero, regroup the 1 to the next place value)
2+ 2 (+1) = 5 leave the 5
then bring the one down
15.06
4.3 x 9.6 =
41.28
Find the value of
0.15 divide 3
What is 0.05
Write 14.105 in word form.
Fourteen and one hundred and five thousandths.
How many times and which direction do you move the place value to divide by 100.
Left, two place values
Round 1.635 to the nearest whole number.
What is 2.
The 6 in the next place value tells the 1 to round up! On a number line this number would be closer to 2 than 1.
Describe how to solve a subtraction problem with decimal numbers. Provide an example.
To solve a subtraction problem you must line up the place values, this means the decimal points will line up.
If there is an empty place at the end you must fill it with a zero.
Then subtract. If you cannot take away then you must regroup.
Leo had spent 1,267.17 hours on his Eagle Scout project. The last week he spent 136.7 hours finishing it up. How long did Leo spend working on his Eagle Scout project.
1,403.87 hours
Explain one method to solve a problem multiplying decimals.
How can you make sure your answer is reasonable?
Fraction method
-turn the numbers into fractions (.5 is 5/10)
-then multiply across
Whole Number
-convert the problem to whole numbers by multiplying by 10, 100, or 1,000
-multiply the whole numbers
-divide your answer by the number you used to convert the numbers.
Find the value of
0.18 divide 3
What is 0.06
If you take 18 hundredths and split it into 3 equal groups than there will be 0.06 in each group. It also makes sense that your answer is smaller than what you started with. AND you can check it with multiplicaiton.
Write nine and four hundred thirty six thousandths in number form.
9.436
In which number does the 3 represent 10 x the value of the 3 in 1.93
a- 30
b- 173
c-93
d-8.39
D
Write a number that when rounded to the tenths place is 25.4
What is: 25.4 (1,2,3,4) OR 25.3 (5,6,7,8,9)
999.45 - 99.25
899.93
Find the value of the expression
14.74 + 165 . 6 =
180.34
Each gallon of gas was $3.12. Maisie filled her car up with 14 gallons of gas. How much did she spend?
What is $43.68
0.6 divided by 4
0.15
Determine if the following statements are true or false
0.01 = 0.1
0.308 > 0.35
1.00= 1
false
false
true
Write a number in which the 6 represent x100 the value of the 6 in 94.16
Anything with a 6 in the ones place
6.00 (for example)