📑 Cheatsheet & Ringkasan Rumus Cepat

Kompilasi ringkas rumus Excel, tabel subnetting IP, warna kabel UTP, shortcut Microsoft Word, sintaks Dart, dan aturan grammar bahasa Inggris siap cetak.

🖧 TJKT: Tabel Subnetting IPv4 (/24 - /30)

PrefixSubnet MaskTotal IPHost Valid
/24255.255.255.0256254 host
/25255.255.255.128128126 host
/26255.255.255.1926462 host
/27255.255.255.2243230 host
/28255.255.255.2401614 host
/29255.255.255.24886 host
/30255.255.255.25242 host (PtP)
Rumus Host Valid = 2^(32 - Prefix) - 2

🔌 TJKT: Pinout Kabel UTP RJ-45

Standar T568B (Straight-Through):

  1. Putih Oranye (Tx+)
  2. Oranye (Tx-)
  3. Putih Hijau (Rx+)
  4. Biru
  5. Putih Biru
  6. Hijau (Rx-)
  7. Putih Cokelat
  8. Cokelat

Straight: Ujung A T568B - Ujung B T568B (Router ke PC)

📈 Excel: 10 Fungsi Paling Penting

=SUM(A1:A10) --> Total nilai =AVERAGE(B1:B10) --> Rata-rata =IF(C2>=75, "LULUS", "REMEDI") =VLOOKUP(D2, $A$2:$F$50, 3, FALSE) =IFERROR(VLOOKUP(...), "Tidak Ada") =COUNTIF(E2:E30, "Hadir") =DATEDIF(F2, TODAY(), "Y") --> Umur

📄 Word: Pintasan Keyboard Utama

Ctrl + B / I / U --> Bold / Italic / Underline Ctrl + L / E / R / J --> Left / Center / Right / Justify Ctrl + 1 / 2 / 5 --> Spasi 1.0 / 2.0 / 1.5 Ctrl + Enter --> Page Break Halaman Baru Ctrl + Shift + C / V --> Copy / Paste Format Ctrl + H --> Find and Replace Teks

💻 Simkomdig: Operator Google Search

site:sch.id "jadwal ujian" filetype:pdf "silabus tjkt" "kata persis" -kata_dikecualikan intitle:"laporan k3lh" define:komputasional

⚡ DART: Sintaks Esensial

void main() { print("Hello!"); } String? nama; // Null Safety List angka = [1, 2, 3]; Map user = {"id": 1}; class Siswa { String nama; Siswa(this.nama); }

🌐 B. Inggris: Simple Present vs Past

Present Tense (Habit & Fact):

(+) S + V1 (-s/-es) | (-) S + do/does not + V1

Past Tense (Recount / Past Event):

(+) S + V2 | (-) S + did not + V1

🌐 B. Inggris: Degrees of Comparison

Positive: as + Adj + as (as fast as) Comparative: Adj-er than (faster than) Superlative: the + Adj-est (the fastest) Long Adj: more + Adj than / the most + Adj Irregular: Good -> Better -> The Best