4 (ʻehā) he helu maʻamau ma waena o ka3 a me ka5. Hehelu pālua ia (2 × 2 = 4), a hehelu ʻoi (composite number). Ma kamoʻomeheu Hawaiʻi, he koʻikoʻi ka helu ʻehā no nākūkulu ʻehā o ka honua a me nāakua nui ʻehā:Kāne,Kū,Lono, a meKanaloa. Ma nā moʻolelo kahiko oʻĀkia Hikina, kū ka 4 ma ke ʻano hehelu pōʻino, no ka mea, like ke kani o "4" me ka huaʻōlelo no ka make ma kēia mau ʻōlelo.
Ma ka makemakika, aia ʻehāhana maʻamau: kahuinahelu (+), kalawenahelu (−), kahoʻonui (×), a me kamāhele (÷). He helu pālua ka 4, a he helu piha, a hehelu Harshad. ʻO ia kekahi o nā helu Harshad a pau ʻehā.
He helu māhele ka 4 ma o ka 1, 2, a me ka 4. He helu pālua maikaʻi loa ia, no ka mea, hiki ke māhele ʻia e ka 2 hoʻokahi manawa wale nō (4 = 2 × 2).
| Hoʻonui |
|---|
| Multiplication | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 50 | 100 | 1000 |
|---|
| 4 × x | 4 | 8 | 12 | 16 | 20 | 24 | 28 | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | 96 | 100 | 200 | 400 | 4000 |
| Māhele |
|---|
| Division | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
|---|
| 4 ÷ x | 4 | 2 | 1.3 | 1 | 0.8 | 0.6 | 0.571428 | 0.5 | 0.4 | 0.4 | 0.36 | 0.3 | 0.307692 | 0.285714 | 0.26 | 0.25 |
| x ÷ 4 | 0.25 | 0.5 | 0.75 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.25 | 2.5 | 2.75 | 3 | 3.25 | 3.5 | 3.75 | 4 |
| Mana |
|---|
| Exponentiation | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
|---|
| 4ˣ | 4 | 16 | 64 | 256 | 1024 | 4096 | 16384 | 65536 | 262144 | 1048576 | 4194304 | 16777216 | 67108864 | 268435456 | 1073741824 | 4294967296 |
| x⁴ | 1 | 16 | 81 | 256 | 625 | 1296 | 2401 | 4096 | 6561 | 10000 | 14641 | 20736 | 28561 | 38416 | 50625 | 65536 |
He nui nā mea geometry me ʻehā ʻaoʻao a i ʻole ʻehā huina. ʻO kahuinahā loa kekahi laʻana maʻamau, me ʻehā huina kūpono (90°) a me nā ʻaoʻao kūʻē like. ʻO kapaʻaʻilihā he pōhaku me ʻehā ʻaoʻao a me ʻehā kihi. Wahi a kafour-color theorem, hiki ke hoʻohana i ʻehā waihoʻoluʻu wale nō e kaha i kekahi palapala ʻāina, i ʻole e pili nā wahi e kokoke ana ma ke ʻano like.
Ma ka moʻomeheu Hawaiʻi, he koʻikoʻi ka helu ʻehā ma nā ʻano like ʻole. Aia nākūkulu ʻehā, ʻo ia hoʻi nā kukuna ʻehā o ka honua. Aia nāakua nui ʻehā: ʻoKāne,Kū,Lono, a meKanaloa. Ua ʻike ʻia nākino ʻehā o Kāne: ka lā, ke kai, ka ua, a me ka makani. Ma kēia mau hiʻohiʻona, hōʻike ʻia ka pilina o ka helu ʻehā i ka ʻāina a me ke ao holoʻokoʻa.
MaKina,Iāpana, a meKōlea, he helu pōʻino ka 4 no ka mea like ke kani me ka huaʻōlelo no ka make. No kēia kumu, ʻaʻohe helu 4 ma nāhale kiʻekiʻe a ma nāhōkele. MaZia, hehelu kapu ka 4, a hoʻohana ʻia ma nā hana kapu. Ma ka honua holoʻokoʻa, aia ʻehākau o ka makahiki: ka hoʻoilo, ke kupulau, ke kauwela, a me ka hāʻulelau. He ʻehā pule ma kēlā me kēiamahina mahina (lunar month), a no laila, he mea nui ka 4 i ka helu ʻana i ka manawa.
