Name_____________________________________ #_______ Date_____________________ 7.3.1 7-86 to 7-90
7-86. Recall that inverse operations “undo” each other. Write the inverse operation for each situation
below. Homework Help ✎
a. Add
b. Subtract 1
c. Divide by 8
d. Multiply by 12
7-87. Draw the table below on your paper and look carefully at the algebra tiles to fill in each of the steps. Use
your own numbers in the trials, again considering fractions, decimals, and zero. Homework Help ✎
Steps
1. Pick a number
2. Add ____
3. Multiply by ____
4. Subtract ____
5. Divide by ____
6. Subtract the original number
Trial 1
Trial 2
Trial 3
Algebra Tile Picture
7-88. On graph paper, draw a rectangle with a width of 5 units and a length of 7 units. Homework Help ✎
a. Draw a new rectangle that is an enlarged copy of your original rectangle and has a length of 13 units.
b. Show how you can calculate the width of your new rectangle.
7-89. Kate has five sandwiches to share with three of her friends. If each person gets the same amount of
sandwich, how much will each person get? Homework Help ✎
7-90. Find the area and perimeter of each figure below. Homework Help ✎
a.
b.