2. 5.3) Number, operation, and quantitative reasoning . The
student adds, subtracts, multiplies, and divides to solve
meaningful problems. The student is expected to:
a) use addition and subtraction to solve problems involving
whole numbers and decimals
b) use multiplication to solve problems involving whole
numbers
c) use division to solve problems involving whole numbers
including the remainder

3. Rules to Adding Decimals
1) If you have a whole number and it does not
have a decimal, you have to add a decimal at
the end of the whole number.
2)ALWAYS line up your decimals.

4. 1.) 314 + 783.12
314
314.00
314.00
+
783.12
___________
1
109 7 2
.
1) Add the decimal at
the end of the whole
number.
2) Line up the decimals.

5. Rules for Subtracting Decimals
1) If you have a whole number and it does not
have a decimal, you have to add a decimal at the
end of the whole number.
2) ALWAYS subtract your small number from
your large number. (Large number - Small
number)
3) ALWAYS line up the decimals.

6. Rule for Multiplying
1) Always start with your last digit from your
second number.

7. 1) 12 x 9
1
12
X
9
10 8
2) 112 x 3
X
112
3
3 36

8. Rules for Dividing Decimals
1) Large number goes inside the “house”
2) If your quotient does not come out as a decimal
then put the remainder on the side

9. 1)
.
.
61 5
12
5 61
-5
11
- 10
01
R1