Test Taking Technigues (Arithmetic)

Front 1

Common denominator of:
1/4 + 1/2 + 1/5

Back 1

Since 2 is a multiple of 4, just find the commonality between 4 & 5.
A) 20

Front 2

31/125 = ?
(a) 0.248 (b) 0.252 (c) 0.284
(d) 0.312 (e) 0.320

Back 2

1) 31/125 >> 30/120
2) 30/120 = 1/4
3) (31- 30)/(125-120) = 1/5
4) 1/4>1/5<31/125 {erase the term "1/5" & "<" and slide the remaining two terms together}
>> 1/4>31/125 = 0.25>31/125
A) 0.248

Front 3

87/165 = ?
(a) 0.509 (b) 0.493 (c) 0.439
(d) 0.863 (e) 0.824

Back 3

1) 84/165 >> 80/160
2) 80/160 = 1/2
3) (84-80)/(165-160) = 4/5
4) 1/2<4/5>84/165 {erase the term "4/5" & ">" and slide the remaining two terms together}
>> 1/2<84/165 = 0.5<84/165
A) 0.509

Front 4

In one week, 1/8 of the pizzas sold were mushroom, and 1/3 of the remaining pizzas sold were pepperoni. If n pizzas sold were pepperoni; how many were mushroom?

Back 4

Choose the lowest common denominator of 8 & 3 for the total amount of pizzas sold, which is 24.
_________________________
1) 1/8(24) = 3 = mushroom
2) 24-3 = 21 = remaining
3) 1/3(21) = 7 = pepperoni
A) (3/7)n = (3/7)7 = 3 = mushroom = (3/7)n