Jawaban dan Penjelasan dengan langkah-langkah:
17.
= 4 2/6 : 2 1/4 : 1 2/4 = (4x6+2)/6 : (2x4+1)/4 : (4+2)/4
= 26/6 : 9/4 : 6/4 = 26/6 x 4/9 x 4/6 = (26 x 16) / (36 x 9)
= 104 / 81
= 1 23/81
18.
36% Penduduk = Pedagang
0.18 Penduduk = Pegawai
Sisa = Petani
9/45 Penduduk = Nelayan
Sisa =?
1 = 36/100+0.18+9/45+ Sisa
1 = 9/25 + 18/100 + 3/15 + Sisa
1 = 9/25 + 9/50 + 3/15 + Sisa
150/150 = (9x6)/150 + (9x3)/150 + 30/150 + Sisa
Sisa = (150-54-27-30)/150 = 39/150 = 13/50 (C)
19.
9 Tas
1 tas memerlukan 1,25 m kain
Kain yang ada 12,6 m
Sisa kain = 3 dompet dengan ukuran sama
Kain yang diperlukan 9 tas = 9 x 1,25 m = 11.25 m
Kain sisa = 12.6-11.25 = 1.35 m
Kain tiap dompet = 1.35/3 m = 0.45 m (B)
20.
Luas benih kacang = 819 m2/3.5 kg kacang
Luas kebun = 3276 m2
Benih yang diperlukan = 3276 m2 / (819 m2) x 3.5 kg kacang
= 14 kg kacang (D)
Penjelasan dengan langkah-langkah:
17)
4²/6 : 2¼ : 1²/⁴
= 4⅓ : 2¼ : 1½
= 13/3 : 9/4 : 3/2
= 13/3 × 4/9 × 2/3
= 104/81
= 1 ²³/81
18) C
Petani = 1 – 36% – 0,18 – 9/45
= 100% – 36% – 18% – 20%
= 100% – 74%
= 26%
= 13/50
19) C
Tiap dompet memerlukan kain sepanjang =
(12,6 – 9 × 1¼)/3
= (12,6 – 45/4)/3
= (12,6 – 11,25)/3
= 1,35/3
= 0,35 meter
20) D
Banyaknya benih kacang hijau
= 3.276/819 × 3,5
= 4 × 3,5
= 14,0 kg
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Jawaban dan Penjelasan dengan langkah-langkah:
17.
= 4 2/6 : 2 1/4 : 1 2/4 = (4x6+2)/6 : (2x4+1)/4 : (4+2)/4
= 26/6 : 9/4 : 6/4 = 26/6 x 4/9 x 4/6 = (26 x 16) / (36 x 9)
= 104 / 81
= 1 23/81
18.
36% Penduduk = Pedagang
0.18 Penduduk = Pegawai
Sisa = Petani
9/45 Penduduk = Nelayan
Sisa =?
1 = 36/100+0.18+9/45+ Sisa
1 = 9/25 + 18/100 + 3/15 + Sisa
1 = 9/25 + 9/50 + 3/15 + Sisa
150/150 = (9x6)/150 + (9x3)/150 + 30/150 + Sisa
Sisa = (150-54-27-30)/150 = 39/150 = 13/50 (C)
19.
9 Tas
1 tas memerlukan 1,25 m kain
Kain yang ada 12,6 m
Sisa kain = 3 dompet dengan ukuran sama
Kain yang diperlukan 9 tas = 9 x 1,25 m = 11.25 m
Kain sisa = 12.6-11.25 = 1.35 m
Kain tiap dompet = 1.35/3 m = 0.45 m (B)
20.
Luas benih kacang = 819 m2/3.5 kg kacang
Luas kebun = 3276 m2
Benih yang diperlukan = 3276 m2 / (819 m2) x 3.5 kg kacang
= 14 kg kacang (D)
Penjelasan dengan langkah-langkah:
17)
4²/6 : 2¼ : 1²/⁴
= 4⅓ : 2¼ : 1½
= 13/3 : 9/4 : 3/2
= 13/3 × 4/9 × 2/3
= 104/81
= 1 ²³/81
18) C
Petani = 1 – 36% – 0,18 – 9/45
= 100% – 36% – 18% – 20%
= 100% – 74%
= 26%
= 13/50
19) C
Tiap dompet memerlukan kain sepanjang =
(12,6 – 9 × 1¼)/3
= (12,6 – 45/4)/3
= (12,6 – 11,25)/3
= 1,35/3
= 0,35 meter
20) D
Banyaknya benih kacang hijau
= 3.276/819 × 3,5
= 4 × 3,5
= 14,0 kg