Math 1021 โ Beginning of the Semester Review
In 1 โ 3, fill in the blanks to make each statement true.
1. The property abba +=
+
is called the _________________ of addition, and
is called the __________________ property.
() (
cbacba ++=++
)
2. The additive inverse of is __________, and the multiplicative inverse of is
______. 3โ3/1
3. The additive inverse of 0 is __________, that is,
=
โ
0__________; the multiplicative
inverse of 1 is __________, that is,
=
โ1
1__________.
Evaluate each expression in 4 โ 5.
4. (a)
()
()(
[]
24126 348 โรท+รท
)
)
)
(b)
()
[]
{}
24126 348 โรท+รท
(c)
[]
24126348 โรท+รท
(d)
24126348 โรท+โ
รท
5. (a)
()(
[]
339188 โ
รท+โ
(b)
()
[]
339188 โ
รท+โ
(c)
[]
339188 โ
รท+โ
(d)
339188 โ
รท+โ
In 6 โ 9, fill in the blanks to make each statement true.
6. To compute when and are unequal and have opposite signs, we
_______________.
ba +ab
7. When there is a minus sign before parentheses, the parentheses can be removed by
___________ of each term inside the parentheses.
8. The subtraction is equal to the addition _________________.
ba โ
9. The division is equal to the multiplication __________________.
ba /
In 10 โ 15, evaluate each of the following.
10. 11.
(
27 โ+โ
(
)
44
โ
+โ 12.
(
)
85
โ
โ
13.
()
83 โ+
14.
()
15.
(
53 โโ
)
6
24
โ
1
