Decimals
What is the rule for adding and subtracting decimals?
line up the decimals.
When finding the GCF of 2 numbers is the answer smaller or bigger than the numbers?
smaller
A fraction is a.....
part of a whole
1/2 * 3/4
3/8
Which statement shows correct reasoning for finding 12 divided 3/8?
A. Multiply 12 by 8, then divide by 3.
B. Multiply 12 by 3, then divide by 8.
C. Multiply 3 by 8, then divide by 12.
D. Multiply 12 by , then multiply by 3.
A
0.58-0.23
0.35
10.35
When dividing decimals do you not want a decimal on the outside or underneath?
outside
When finding the LCM of 2 numbers, does the answer get bigger or smaller?
bigger
To add/subtract fractions you have to have....
common denominators
3/5 * 4/5
12/25
10/3 divided by 2/6
60/6 or 10
1- 0.5904
0.4096
1.8 + 2.3
4.1
Which digit is in the thousandths spot? 17.324
4
Find the GCF of 15 and 45
15
The rule for multiplying fractions is...
straight across
5/6 * 2/3
10/18 or 5/9
3/4 divided by 1/5
15/4 or 3 3/4
0.25+ 0.542
0.792
0.64 divided by 2
0.32
When dividing numbers/decimals by powers of 10, what are the 2 steps?
1. count zeros. 2. move decimal left that many spots.
find the LCM of 2 and 7
14
The rule for dividing fractions is....
KCF
1/4 * 2/3
2/12
9/2 divided by 3/4
6
18.45 + 5.234
23.684
3/4 * 5/9
15/36 or 5/12
What are the 3 steps for multiplying decimals?
1. remove decimals point
2. times like normal.
3. count decimal spots and move decimals to the left.
find the GCF of 4 and 18
2
change to improper, change back to mixed number by dividing
5/8 * 2/3
10/24
4/6 or 2/3
0.991-0.43
0.541
1/5 divided by 3/2
2/15