11 (skaitlis)

11 (vienpadsmit) ir 5. pirmskaitlis, tas ir naturāls skaitlis, kas atrodas starp 10 un 12.

Matemātikā

11 - piektais pirmskaitlis, mazākais divciparu pirmskaitlis decimālajā skaitīšanas sistēmā
11 - ceturtais Sofijas Žermēnas pirmskaitlis
2¹¹ = 2048

Reizināšana	1	2	3	4	5	6	7	8	9	10		11	12	13	14	15	16	17	18	19	20		21	22	25		50	100	1000
$11\times x$	11	22	33	44	55	66	77	88	99	110		121	132	143	154	165	176	187	198	209	220		231	242	275		550	1100	11000

Dalīšana	1	2	3	4	5	6	7	8	9	10
Dalīšana	11	12	13	14	15
$11\div x$	11	5,5	$3,{\overline {6}}$	2,75	2,2	$1,8{\overline {3}}$	$1,{\overline {571428}}$	1,375	$1,{\overline {2}}$	1,1
$11\div x$	1	$0,91{\overline {6}}$	$0,{\overline {8}}4615{\overline {3}}$	$0,7{\overline {8}}5714{\overline {2}}$	$0,7{\overline {3}}$
$x\div 11$	$0,{\overline {09}}$	$0,{\overline {18}}$	$0,{\overline {27}}$	$0,{\overline {36}}$	$0,{\overline {45}}$	$0,{\overline {54}}$	$0,{\overline {63}}$	$0,{\overline {72}}$	$0,{\overline {81}}$	$0,{\overline {90}}$
$x\div 11$	$1,{\overline {09}}$	$1,{\overline {18}}$	$1,{\overline {27}}$	$1,{\overline {36}}$	$1,{\overline {45}}$

Pakāpes	1	2	3	4	5	6	7	8	9	10		11
$11^{x}\,$	11	121	1331	14641	161051	1771561	19487171	214358881	2357947691	25937424601		285311670611
x¹¹	1	2048	177147	4194304	48828125	362797056	1977326743	8589934592	31381059609	100000000000		285311670611

	$+$	$-$	$\times$	$\div$
0	$0+11\$	$0-(-11)\$	-	-
1	$1+10\$	$1-(-10)\$	$1\times 11$	$1\div 0.{\overline {0}}{\overline {9}}$
2	$2+9\$	$2-(-9)\$	$2\times 5.5\$	$2\div 0.{\overline {1}}{\overline {8}}$
3	$3+8\$	$3-(-8)\$	$3\times 3.{\overline {6}}\$	$3\div 0.{\overline {2}}{\overline {7}}$
4	$4+7\$	$4-(-7)\$	$4\times 2.75\$	$4\div 0.{\overline {3}}{\overline {6}}$
5	$5+6\$	$5-(-6)\$	$5\times 2.2\$	$5\div 0.{\overline {4}}{\overline {5}}$
6	$6+5\$	$6-(-5)\$	$6\times 1.8{\overline {3}}\$	$6\div 0.{\overline {5}}{\overline {4}}$
7	$7+4\$	$7-(-4)\$	$7\times 1.{\overline {5}}{\overline {7}}{\overline {1}}{\overline {4}}{\overline {2}}{\overline {8}}\$	$7\div 0.{\overline {6}}{\overline {3}}$
8	$8+3\$	$8-(-3)\$	$8\times 1.375\$	$8\div 0.{\overline {7}}{\overline {2}}$
9	$9+2\$	$9-(-2)\$	$9\times 1.{\overline {2}}\$	$9\div 0.{\overline {8}}{\overline {1}}$
10	$10+1\$	$10-(-1)\$	$10\times 1.1\$	$10\div 0.{\overline {9}}{\overline {0}}$
11	$11+0\$	$11-0\$	$11\times 1\$	$11\div 1$