
operasi hitung matematika
Presentation
•
Mathematics
•
2nd - 3rd Grade
•
Hard
Putri Nur
Used 5+ times
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10 Slides • 1 Question
1
By Putri Nur Hasanah
2
coba kerjakan latihan soal disamping!
Some text here about the topic of discussion.
3
Tertutup : a + b ∈ bilangan bulat
Komutatif : a + b = b + a
Asosiatif : (a + b) + c = a + (b + c)
Unsur Identitas : a + 0 = a
Some text here about the topic of discussion.
SIFAT PENJUMLAHAN
4
Pengurangan adalah lawan/invers dari penjumlahan.
ATURANNYA:
JIKA BERTANDA - + , (DIBACA TIDAK KE KANAN ARTINYA KE KIRI) = -
CONTOH : DIMULAI DARI 0 YA
JIKA BERTANDA - - , DIBACA TIDAK KE KIRI ARTINYA KE KANAN = +
SIFAT PENGURANGAN
5
Tertutup : a x b ∈ bilangan bulat
Komutatif : a x b = b x a
Asosiatif : (a x b) x c = a x (b x c)
Unsur identitas : a x 1 = a
Distributif :
a (b + c) = ab + ac
a (b - c) = ab – ac
SIFAT PERKALIAN
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Pembagian adalah kebalikan dari perkalian
Kebalikan (invers) dari perkalian a * b = a x 1/b
Some text here about the topic of discussion.
SIFAT PEMBAGIAN
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Jika dalam suatu soal terdapat lebih dari 1 jenis operasi bilangan bulat, maka perhatikanlah urutan pengerjaan berikut
Dahulukan dalam kurung terkecil
Kali dan bagi diselesaikan lebih dahulu dari pada tambah dan kurang
Jika terdapat perkalian dan pembagian, dahulukan yang lebih dulu muncul
Jika terdapat penjumlahan dan pengurangan, dahulukan yang lebih dulu muncul
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• 5 × −3 − 3 = 5 × −6 = −30 →Dahulukan di dalam kurung
• 5 × −3 − 3 = −15 − 3 = −18 →Dahulukan perkalian
• 14 ∶ 7 × 2 = 2 × 2 = 4 →Dahulukan yang lebih dulu muncul
• 14 ∶ (7 × 2) = 14 : 14 = 1 →Dahulukan di dalam kurung
• 14 − 2 × 6 ∶ 4 + 7 × 2 = 14-12:4+14→Dahulukan perkalian dan pembagian yang muncul =14-3+14 =25→ Dahulukan pembagian
Subject | Subject
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9
10
Multiple Choice
Hasil dari (20+30)+45−20×2÷20 adalah ...
93
4,5
30
7,5
20
11
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