Ch 6 Review pg 467-469

The product of any factor and 1 is equal to the factor.

• Commutative Property

• Identity Property

• Associative Property

Finding the approximate (about) value of a number.

• compatible numbers

• powers of 10

• rounding

The order in which factors are multiplied does not change the product.

• Identity Property

• Commutative Property

• Associative Property

• rounding

• powers of 10

• compatible numbers

Numbers that are easy to multiply mentally.

• powers of 10

• compatible numbers

• powers of 10

The grouping of the factors does not change the product.

• Associative Property

• Commutative Property

• Identity Property

Estimate: $4.80 x 5 =

Estimate: 3.36 x 4 =

Estimate: 10.8 x 7 =