10-Minute Methods Memory Improvement for KIDS: Educational Success for Your Child Through S

10-Minute Methods Memory Improvement for KIDS: Educational Success for Your Child Through S

Matematika Tolong dijawab ya kak :) ​

Tolong dijawab ya kak :) ​

Jawaban:

1. Sita = 16 tahun

Dewi = 24 tahun

perbandingan umur Sita dan Dewi

= 16 : 24. di bagi 8

= 2 : 3

2. P = 2/5 x Q

P = 5.000.000

Q = ?

2/5 Q = 5.000.000

Q = 5.000.000 : 2/5

Q = 5.000.000 x 5/2

Q = 25.000.000 / 2

Q = 12.500.000

3. A = uang Andi

B = uang Bayu

A = 3/7 x B

A + B = 300.000

3/7B + B = 300.000

3/7B + 7/7B = 300.000

10/7 B = 300.000

B = 300.000 : 10/7

B = 300.000 x 7/10

B = 210.000

A = 3/7 x 210.000

A = 90.000

diberikan 10.000 ke A

Jadi

A = 90.000 + 10.000 = 100.000

B = 210.000 - 10.000 = 200.000

perbandingan uang Andi dan Bayi =

= 100.000 : 200.000

= 1 : 2

4. A ke B = 18 km = 1.800.000 cm

skala = 1 : 400.000

A ke B di gambar =

1.800.000 / 400.000 = 4,5 cm

5. Susi : Ghea : Nida = 3 : 2 : 5

Ghea = 700.000

Ghea = 2/(2+3+5) x Total uang

700.000 = 2/10 x Total uang

Total uang = 700.000 : 2/10

Total uang = 700.000 x 10/2

Total uang = 3.500.000

Susi = 3/10 x 3.500.000

Susi = 1.050.000

Nida = 5/10 x 3.500.000

Nida = 1.750.000

7. alas = 6 cm x900 = 5400

tinggi = 6 cm x 900 = 5400

luas segitiga

= 1/2 x 5400 x 5400

= 14.580.000 cm²

= 1.458 m²

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