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Kunci Jawaban Matematika Kelas 7 Halaman 25

Berikut ini adalah pernyataan lengkap dari soal Matematika Kelas 7 Halaman 25.

#1 Soal Matematika Kelas 7 Halaman 25

Soal Matematika Kelas 7 Halaman 25

Soal Matematika Kelas 7 Halaman 25 merupakan soal dari Kegiatan 1.3 Perkalian dan Pembagian Bilangan Bulat BAB BILANGAN Matematika Kelas 7 Semester 1.

Kita diminta mengecek sifat-sifat operasi perkalian dan pembagian bilangan bulat.

#2 Kunci Jawaban Matematika Kelas 7 Halaman 25

Jawaban dari pertanyaan soal Matematika Kelas 7 Halaman 25 di atas adalah sebagai berikut.

Pembahasan jawaban tabel 1.2 matematika hal 25

Tabel 1.2 yang dimaksud adalah tabel pengecekan sifat komutatif dan asosiatif pada perkalian.

Sifat Komutatif (Pertukaran) Perkalian

  • a × b = b × a

Sifat Asosiatif (Pengelompokkan) Perkalian

  • (a × b) × c = a × (b × c)

Jawaban tabel 1.2 matematika hal 25

Dalam tabel 1.2 terdapat 5 nomor (baris) yang harus kita isi untuk setiap kolomnya.

Nomor 1 ⇒ a = 1, b = 5 dan c = 4

  • a × b = 1 × 5 = 5
  • b × a = 5 × 1 = 5
  • (a × b) × c = 5 × 4 = 20
  • b × c = 5 × 4 = 20
  • a × (b × c) = 1 × 20 = 20

Nomor 2 ⇒ a = –2, b = 6 dan c = –3

  • a × b = –2 × 6 = –12
  • b × a = 6 × (–2) = –12
  • (a × b) × c = (–12) × (–3) = 36
  • b × c = 6 × (–3) = –18
  • a × (b × c) = –2 × (–18) = 36

Nomor 3 ⇒ a = 3, b = –7 dan c = 2

  • a × b = 3 × (–7) = –21
  • b × a = –7 × 3 = –21
  • (a × b) × c = –21 × 2 = –42
  • b × c = –7 × 2 = –14
  • a × (b × c) = 3 × (–14) = –42

Nomor 4 ⇒ a = –4, b = –8 dan c = –1

  • a × b = –4 × (–8) = 32
  • b × a = –8 × (–4) = 32
  • (a × b) × c = 32 × (–1) = –32
  • b × c = –8 × (–1) = 8
  • a × (b × c) = –4 × 8 = –32

Nomor 5 ⇒ misal kita pilh a = –2, b = –3 dan c = 4

  • a × b = –2 × (–3) = 6
  • b × a = –3 × (–2) = 6
  • (a × b) × c = 6 × 4 = 24
  • b × c = –3 × 4 = –12
  • a × (b × c) = –2 × (–12) = 24

Pembahasan jawaban tabel 1.3 matematika hal 25

Tabel 1.3 yang dimaksud adalah tabel pengecekan sifat distributif pada perkalian terhadap penjumlahan.

Sifat Distributif (Penyaluran) Perkalian terhadap Penjumlahan

  • a × (b + c ) = (a × b) + (a × c)

Jawaban tabel 1.3 matematika hal 25

Dalam tabel 1.3 terdapat 5 nomor (baris) yang harus kita isi untuk setiap kolomnya.

Nomor 1 ⇒ a = 1, b = 5 dan c = 4

  • b + c = 5 + 4 = 9
  • a × (b + c) = 1 × 9 = 9
  • a × b = 1 × 5 = 5
  • a × c = 1 × 4 = 4
  • (a × b) + (a × c) = 5 + 4 = 9

Nomor 2 ⇒ a = –2, b = 6 dan c = –3

  • b + c = 6 + (-3) = 3
  • a × (b + c) = -2 × (3) = -6
  • a × b = -2 × 6 = -12
  • a × c = -2 × (-3) = 6
  • (a × b) + (a × c) = -12 + 6 = 6

Nomor 3 ⇒ a = 3, b = –7 dan c = 2

  • b + c = -7 + 2 = -5
  • a × (b + c) = 3 × (-5) = -15
  • a × b = 3 × (-7) = -21
  • a × c = 3 × 2 = 6
  • (a × b) + (a × c) = -21 + 6 = -15

Nomor 4 ⇒ a = –4, b = –8 dan c = –1

  • b + c = -8 + (-1) = -9
  • a × (b + c) = -4 × (-9) = 36
  • a × b = -4 × (-8) = 32
  • a × c = -4 × (-1) = 4
  • (a × b) + (a × c) = 32 + 4 = 36

Nomor 5 ⇒ misal kita pilh a = –2, b = –3 dan c = 4

  • b + c = -3 + 4 = 1
  • a × (b + c) = (-2) × 1 = -2
  • a × b = (-2) × (-3) = 6
  • a × c = (-2) × 4 = -8
  • (a × b) + (a × c) = 6 + (-8) = -2

Jawaban tabel 1.4 matematika hal 25

Tabel 1.4 yang dimaksud adalah tabel pengecekan sifat distributif pada perkalian terhadap pengurangan.

Sifat Distributif (Penyaluran) Perkalian terhadap Pengurangan

  • a × (b - c ) = (a × b) - (a × c)

Pembahasan jawaban tabel 1.4 matematika hal 25

Dalam tabel 1.4 terdapat 5 nomor (baris) yang harus kita isi untuk setiap kolomnya.

Nomor 1 ⇒ a = 1, b = 5 dan c = 4

  • b - c = 5 - 4 = 1
  • a × (b - c) = 1 × 1 = 1
  • a × b = 1 × 5 = 5
  • a × c = 1 × 4 = 4
  • (a × b) - (a × c) = = 5 - 4 = 1

Nomor 2 ⇒ a = –2, b = 6 dan c = –3

  • b - c = 6 - (-3) = 9
  • a × (b - c) = -2 × (9) = -18
  • a × b = -2 × 6 = -12
  • a × c = -2 × (-3) = 6
  • (a × b) - (a × c) = -12 - 6 = -18

Nomor 3 ⇒ a = 3, b = –7 dan c = 2

  • b - c = -7 - 2 = -9
  • a × (b + c) = 3 × (-9) = -27
  • a × b = 3 × (-7) = -21
  • a × c = 3 × 2 = 6
  • (a × b) - (a × c) = -21 - 6 = -27

Nomor 4 ⇒ a = –4, b = –8 dan c = –1

  • b - c = -8 - (-1) = -7
  • a × (b - c) = -4 × (-9) = 28
  • a × b = -4 × (-8) = 32
  • a × c = -4 × (-1) = 4
  • (a × b) - (a × c) = 32 - 4 = 28

Nomor 5 ⇒ misal kita pilh a = –2, b = –3 dan c = 4

  • b - c = -3 - 4 = -7
  • a × (b - c) = (-2) × (-7) = 14
  • a × b = (-2) × (-3) = 6
  • a × c = (-2) × 4 = -8
  • (a × b) - (a × c) = 6 - (-8) = 14

Demikianlah soal dan Kunci Jawaban Matematika Kelas 7 Halaman 25, semoga bermanfaat.

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