HW, Tuesday September 9, ALGEBRA

Complete the following problems on loose leaf paper for tomorrow.
#1  Start with each number given.  Add 2, subtract 7, add 11, subtract 15. Write down the ending number
a.)  Start:  12      End?
b.) Start: 23        End?
c.) Start: 6          End?
d.) Start: 8          End?
e.) Write down the rule for getting your ending number. (Explain how you can get your answer when you start with 12, when you start with 23, etc.)

#2 Find the differences
a.)  313- 189
b.) 189 - 313
c.) 1000 - 5
d.) 5 - 1000
e.) 760 - 88
f.)  88 - 760
g.)  How does the result change when you reverse the summands in subtraction?

#3 FIND each difference and record the last digit in each difference.
a.) 62 - 38
b.) 62 - 48
c.) 62 - 58
d.) 62 - 68
e.) 62 - 78
f.) 62 - 88
g.) What was the pattern for the last digits in the differences?