2-1: Multiplication PatternsWhen Multiplying products of 10:• Multiply the non-zero digits• Write one zero to the right of the

product for each zero in the factor or factors.When Multiplying a decimal by 10, 100, or

1,000:• Multiply the non-zero digits.• Count the number of zeros in the

multiplier.• Move the decimal point in the Multicand

to the right one place for each zero.• Write as many zeros in the product as

needed to place the decimal point correctly.

.004 MultiplicandX 100 MultiplierProduct

2-2: Estimate Products

2-3: Multiply Whole Numbers

2-4: Multiply DecimalsMultiply as you would with Whole

Numbers.Count the number of Decimal Places in

both Factors.Mark off the same number of decimal

places in the product.

Factor- Number being MultipliedProduct- Answer from Multiplication

Decimal Song

2-5: ExponentsExponent- Used to express a number that is a product of factors that are the sameAny Exponent tells how many times to use the base as a factor.Cubed= “to the third powerSquared= “to the second power”Example:25= 2 x 2 x 2 x 2 x 2 = 322- Base5- Exponent25= Exponential Form32= Standard Form

2-6: Scientific NotationScientific Notation- Expresses a product of two factors. One factor is a number greater than 1 but less than 10. The other factor is a power of 10.

How to: When given a whole number, move the decimal point to the left how

ever many spaces necessary to make the number between 1-10. How ever many spaces we moved becomes the power of 10. Drop the zeros of the first number to make it the first factor.

2-7: Problem Solving Strategy

Read- Visualize yourself in the problem as you read it. Plan- Use the information to write an equation. Solve CheckEx. : Bernice has a collection of 90 stamps from Europe and Africa. Sixty stamps are from Europe. How many stamps does she have from Africa?

90= E + A90= 60 + ASolve for A

A=30