
rumus matematika
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Mathematics
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2nd Grade
•
Hard
Andi Ashari
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11 Slides • 0 Questions
1
By Andi Ayu Ashari, S.Pd
Rumus matematika
2
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Rumus Menghitung Skala
A.ayu Ashari, S.Pd
S=JP
JS
JP : JARAK SEBENARNYA
7 CM : (42 x100.000)
1 : 600.000 CM
Jarak sebenarnya Palangkaraya dengan samarinda adalah 24km.jika jarak pada peta 7cm, Tentukan skala yang digunakan pada peta !!
JP
( S ) (JS)
4
A.ayu Ashari, S.Pd
Operasi Bilangan Bulat
1). Sifat Komutatif Penjumlahan
Rumus: d + e = e + d
Contoh: 23 + 4 = 4 + 23 = 27
2). Sifat Asosiatif Penjumlahan
Rumus: (d + e) + f = d + (e + f)
Contoh:
(100 + 4) + 9 = 100 + (4 + 9)
(104) + 9 = 100 + (13) = 113
5
Operasi Hitungan Bilangan Campuran
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A.ayu Ashari, S.Pd
Luas Bangun Datar
Persegi: L = s²
Persegi Panjang: L = panjang x lebar
Segitiga: L = ½ alas x tinggi
Lingkaran: L = π x r²
Trapesium: L = ½ tinggi × (a + b)
Jajar genjang: L = alas x tinggi
Layang-layang dan belah ketupat: L = ½ x d
Persegi: L = s²
Persegi Panjang: L = panjang x lebar
Segitiga: L = ½ alas x tinggi
Lingkaran: L = π x r²
Trapesium: L = ½ tinggi × (a + b)
Jajar genjang: L = alas x tinggi
Layang-layang dan belah ketupat: L = ½ x d
7
Satuan Berat
A.ayu Ashari, S.Pd
8
A.ayu Ashari, S.Pd
Sistem Koordinat
Koordinat Cartesius terbentuk dari 2 sumbu:
x: Absis / Sumbu Mendatar
y: Ordinat / Sumbu Tegak
Pada titik 0:
Nilai positif: absis mengarah ke bagian kanan, ordinat mengarah ke bagian atas
Nilai negatif: absis mengarah ke bagian kiri, ordinat mengarah ke bagian bawah
9
A.ayu Ashari, S.Pd
Satuan Volume
Contoh
1 x 10-9 hm3 = 0.000001 hm3 = 0.001 dam3 = 1 m3 = 1.000 dm3 = 1.000.000 cm3 = 1.000.000.000 mm3
10
Operasi Hitungan Bilangan Campuran
Operasi Hitung Bilangan Campuran memiliki 2 ketentuan:
Jika terdapat tanda kurung (), kerjakan yang ada di dalam tanda kurung terlebih dahulu.
Jika tidak ada tanda kurung (), kerjakan perkalian dan pembagian dahulu. Kemudian, kerjakan penjumlahan dan pengurangan.
Contoh: 2000 – 40 x 10 : 4 – (10 + 50)
= 2000 – 40 x 10 : 4 – 60
= 2000 – 400 : 4 – 60
= 2000 – 100 – 60
= 1840
11
A.ayu Ashari, S.Pd
Sifat Komutatif Perkalian
Rumus: d x e = e x d
Contoh: 150 x 2 = 2 x 150 = 300Replace this text with your title
By Andi Ayu Ashari, S.Pd
Rumus matematika
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