Necessary Number Sense Memory Work
Roman Numerals
I=1
V=5
X = 10
L = 50
C = 100
D = 500
M = 1000
Measurement
1 yard = 3 feet
1 foot = 12 inches
1 pint = 16 ounces
1 quart = 2 pints
1 quart = 32 ounces
1 gallon = 4 quarts
1 gallon = 8 pints
***If a small number is in front of a large one,
then you must subtract it, if it is after, then
you must add it***
1 centimeter = 10 millimeters
1 meter = 100 centimeters
1 meter = 1000 millimeters
1 yard = 3 feet
1 mile = 1,760 yards
1 pound = 16 ounces
1 ton = 2000 pounds
60 seconds = I minute
60 minutes = 1 hour
7 days = 1 week
24 hours = 1 day
Cubes **Advanced**
Squares
112 = 121
122 = 144
132 = 169
142 = 196
152 = 225
162 = 256
172 = 289
182 = 324
192 = 361
202 = 400
212 = 441
222 = 484
232 = 529
242 = 576
252 = 625
262 = 676
272 = 729
282 = 784
292 = 841
302 = 900
312 = 961
322 = 1,024
332 = 1,089
342 = 1,156
352 = 1,225
362 = 1,296
372 = 1,369
382 = 1,444
392 = 1,521
402 = 1,600
13 = 1
23 = 8
33 = 27
43 = 64
53 = 125
63 = 216
73 = 343
83 = 512
93 = 729
103 = 1,000
Geometry
Pentagon = 5 sides
Hexagon = 6 sides
Heptagon = 7 sides
Octagon = 8 sides
Nonagon = 9 sides
Order of Operations
Prime Numbers
Please Excuse My Dear Aunt Sally
A prime number is a number that is only
divisible by 1 and itself. Numbers that are not
prime are called composite numbers. The
smallest prime number, which happens to be
the only even prime number, is 2. The prime
numbers from 2 to 100 are listed below and
should all be memorized.
P = (parentheses) solve everything in parentheses first
E = exponents ex: 32 then exponents
M = multiplication D = division solve in the order
they appear from left to right
A = addition S = subtraction
solve in the order they
appear from left to right
18 + 4 ÷ 2 + 6 X 5 divide and multiply first
18 + 2 + 30
=50
18 ÷ (6 + 3) + 7 – (3 X 5) parentheses first
18 ÷ 9 + 7 - 15 divide next
2 + 7 – 15 finally add and subtract
= -6
2
11
23
31
41
53
61
71
83
97
3
13
29
37
43
59
67
73
89
5
17
7
19
47
79
*notice that there are only 25 primes between
0 and 100.