Adding
4.2 + 3.1
7.3
4.2 - 3.1
1.1
1.5 x 3
4.5
What two operations (adding, subtracting, dividing, or multiplying) is it most important for you to LINE up the DECIMALS?
Adding and Subtracting
Are 0.90 and .9 equivalent decimals?
Yes
7.32 + 5.8
13.12
38.61 - 5.04
33.57
0.9 x 6
5.4
What are the rules for adding decimals?
1. ______________ the decimals.
2. Fill in ____________.
3. ________.
4. Bring ____________________.
1. Line up the decimals.
2. Fill in the zeros.
3. Add
4. Bring the decimal down.
Are 0.009 and 0.090 equivalent decimals?
No
x + 3 = 15
X = 12
9 - x = 3
x = 6
3.12 x 8
24.96
What are the rules for subtracting?
1. Line _________________.
2. ________________ zeros.
3. ______________.
4. ___________________________.
1. Line up the decimals.
2. Fill in the zeroes.
3. Subtract.
4. Bring the decimal down.
Give two equivalent decimals to
0.45
Options:
.45
.450
.4500
.45000
10 + x = 18
x = 8
52 - x = 49
x = 3
4.007 x 4
16.028
What are the rules for multiplying decimals?
1. ______________.
2. _________ the ________ of digits after the _________ in your problem.
3. Your answer will have that many _______ behind your decimal.
1. Multiply.
2. Count the number of digits after the decimal in your problem.
3. Your answer will have that many numbers behind your decimal.
List three equivalent decimals for
.809
Options:
0.809 0.80900
0.8090 0.809000000000000
.8090
.80900