1st Semester Review

3.3 x .51

• 1.683

• 168.3

• .198

On Tuesday, Mr. Rodriguez bought a new video game system for $345.67. On Friday, the system went on sale for $299.99. How much money could Mr. Rodriguez have saved if he would have bought the system on Friday?

• $44.98
• $154.23
• $645.66
• $45.68

7.65 + 16.23 =

• 23.88

• 18.58

• 22.78

• 23.98

8.7+12.8

• 21.5
• 20.5
• 4.1
• 13.5

548 x 3 =

(a)  

261 x 5 =

(a)  

 $5.60\ -\ 3.99$  

• 1.60

• 1.69

• 1.61

• 1.39

When Multiplying Decimals

• We line up the decimal points

• The decimal points don't need to line up

• We get rid of the decimal point

• We add zeros

When Adding and Subtracting decimals

• We don't line up the Decimal point

• We line up the decimal point

• We get rid of the decimal points.

• We skip the problem

The answer to a multiplication problem is called a...

• factor

• product

• multiple

• composite