Tolong kerjakan 1-5 pakai cara yg jelas entar aku kasih jawaban terbaik

1. 150-100 = 50 = 100:50= 2:1

2. 1,5 km = 1.500 m
= 1.500: 500
= 3:1

3.maaf gak tau

4. a umur edi = 2/6 × 42
= 14
b jumlah = 42+14= 56
c selisih = 42-14 =28

5. 800km = 800.000 cm
= 800.000cm:20cm
= 40.000 cm
= 1 : 40.000