Decimal Rule
How do you line up questions with different amounts after the decimal? (E.g. 2.3 + 4.81)
You line them up by the decimal so they are lined up by place value.
18.9 + 3.04 =
21.94
24 + 48 =
72
2.6 x 3 =
7.8
1.32 ÷ 4 =
0.33
What do you do if the number on top is smaller than the number on the bottom when subtracting decimals? (E.g. 3.2 - 1.8)
Regroup/borrow from a larger number. (Borrow from the 3 to give to the 2)
5.15 - 3.12 =
2.03
23 - 15 =
8
4.25 x 4 =
17
3.87 divided by 3 =
1.29
What do you do if there are not enough digits in the top number to subtract a problem?
You have to add on zero's.
0.914 + 2.67 =
3.584
35 + 57 =
92
1.03 x 5 =
5.15
What are Mrs. Hughes' dogs' names?
Gameti and Nana
How do you know where to put the decimal point when multiplying decimals?
You count how many spaces there are to the right of the decimals and make sure you have the same amount to the right of the decimal in your answer.
5 + 2.78 + .030 =
7.81
25 - 18 =
7
2.03 x 15 =
30.45
8.48 ÷ 4 =
2.12
Why should you never argue with a decimal?
Because they always have a point.
5.319 - 4.618
0.701
33 - 17 =
16
1.67 x 2.3 =
3.841
29.48 ÷ 22 =
1.34