Decide which property is illustrated. (6x)(y+15) = (6x)(y)+(6x)(15)

Solve using “Repeated Subtraction”. 12462{“version”:”1.1″,”math”:”12462″}

Decide whether or not the set is closed under multiplication {1,2,3,4,…,40}

Solve using the “Scratch” algorithm.

Solve using the “Place Value” method.

Write the base-four numeral for the base-four blocks shown.

Perform the operation using the indicated base.  HINT:  you may want to think about it in terms of concrete blocks

a)  Rewrite the subtraction problem as and equivalent addition problem:  32-8=24 b)  Rewrite the problem as a multiplication problem:   52÷4=13{“version”:”1.1″,”math”:”52÷4=13″}

Write the numeral in expanded notation then convert it to base 10.

Solve using the “Lattice” algorithm.