CPM Homework Help : MC1 Problem 1-56

Match each of the following descriptions of pennies with its possible numerical expression. Then calculate the value of each expression.

$8(12)+7$

$6(20)+5$

$11(10)+7$

$9(12)+5$

$11$ piles of $10$ pennies with $7$ leftover pennies
A rectangular array of pennies that is $9$ pennies long and $12$ pennies wide with $5$ leftover pennies
$8$ stacks of $12$ pennies with $7$ leftover pennies
A rectangular array of pennies that is $6$ pennies wide and $20$ pennies long with $5$ leftover pennies

Hint:

It may help to visualize each description of pennies.

Also, try to write your own numeric expression for each description before looking at the ones provided.

Answer:

Description (a) matches expression (3) and has a value of $117$ .

Description (b) matches expression (4) and has a value of $113$ .

Description (c) matches expression (1) and has a value of $103$ .

Description (d) matches expression (2) and has a value of $125$ .