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INSTITUTO SAN ROBERTO
FIRST QUARTER MATH LAB
MATH 7TH GRADE – VALLE ALTO
SCHOOL YEAR 2012 – 20123
Name _________________________________7th______ L.#________
SHOW ALL WORK
BASIC OPERATIONS
1)123.45 + 20.33 + 1243.876

2) 1577.3 – 299.4

3) 1568.3 X 12.3

4) 723.4 ÷ 2.3

DIVISIBILITY RULES
5)
a) A number is divisible by 5 if

6) Is
a) 16 divisible by 2?
b) 39 divisible by 3?b) A number is divisible by 3 if
c) 60 divisible by 6?
c) A number is divisible by 6 if

PRIME NUMBERS AND PRIME FACTORIZATION
7) List
a) the first 5 positive prime
numbers

8) List theprime numbers between
10 and 30

b) The first 5 positive composite
numbers

9) Using prime factorization, find
the GCF of 12 and 36

10) Using prime factorization, find
the LCM of 10, 25, and50

11) Find the average of the prime
numbers between 30 and 50

12) Find the average of the composite
numbers between 20 and 35

13) If the prime factorization of a
number is 2×2×3×2×5
a)What´s the number?

14) If the prime factorization of a
number is 2!
×
5!
×
7 and the
prime factorization of a second
number is 2
×
2. What is the GCF
of the two numbers? Explainyour
answer.

b) Write the prime factorization
using exponents.

OPERATIONS WITH FRACTIONS (work with improper fractions, give your
answer as a mixed fraction, simplify if possible)
15) 217)

15
+1
36

2
1
×3
5
2

16) 5

14
−1
25

2
3

18) 1 ÷ 2

1
(use the reciprocal)
2

EVALUATE USING THE ORDER OF OPERATIONS
19)

2 + 3 x 42

20) ( 12 ÷ 4) + (5 – 3)21)

8+3x4–5x3+5

22) ( 6 – 4 )2 + 32 – 3

23)

3 + |- 5 | + 2 3 – 2 x 0

24)

3 + 0 x (8 – 2 )

MATCH THE COLUMNS
Column A
( ____ ) Common factors of 10 and 20
( ____ ) multiples of5
( ____ ) 2( 1 + 4) = (2 x 1) + (2 x 4)
( ____ ) 25 x 1 = 25
( ____ ) multiplication and/or division

16
( ____ )
5
( ____ ) 4,6,8,9,10
( ____ ) 35

Column B
A) Distributive property...