Fractions Flashcards
1/11
9%
9/11
81%
1/7
14%
2/11
18%
5/9
55%
7/11
63%
8/9
88%
6/7
86%
5/11
45%
20^2
400
4/9
44%
1/8
12
14^2
196
5/7
71%
16^2
256
7/8
88%
1/6
17%
13^2
169
19^2
361
3/7
43%
1/9
11%
4/11
36%
5/6
83%
2/7
28%
3/8
38%
11^2
121
18^2
324
15^2
225
4/7
57%
3/11
27%
6/11
54%
3/9
33%
6/9
66%
7/9
77%
5/8
62%
17^2
289
8/11
72%
2/9
22%
23 x 11
253
19 x 11
209
124 x 11
1364
314 x 11
3454
6281 x 11
69091
Numbers divisible by 2 end in . . .
0, 2, 4, 6, 8
Numbers divisible by 5 end in . . .
0, 5
Numbers divisible by 10 end in . . .
0
A number is divisble by 4 if . . .
last two digits divisible by 4
A number is divisible by 8 if . . .
last three digits divisible by 8
A number is divisible by 3 if . . .
the sum of digits is divisible by 3
A number is divisible by 9 if . . .
the sum of digits is divisible by 9
Divisible by 6 if . . .
Number is divisible by 3 and 2
Divisible by 12 if . . .
number is divisible by 3 and 4
Divisible by 11 if . . .
sum of alternating digits divisible by 11
259424
2 - 5 + 9 - 4 + 2 - 4 = 0
Divisible by 7 if . . .
take off last digit, double it, and subtract it from the remaining number. If this divisible by 7 so is original number. Keep going until you can tell.
12345/5
2469.0
695/25
27.8
