tolong yah besok mau kumpul no 2-4

2. 9 x 9 = 81
3. 1km = 100.000 CM
400.000 CM + 2000 CM = 402.000 CM
4. 1 jam = 60 menit
3 jam = 180 menit

nomor 2
[tex]3 ^{3} \times \sqrt{729} = 81 \times 27 = 2187[/tex]
nomor 3
4km+2000cm = 400000cm+2000cm=402000cm
4km+2000cm=4km+0.02km=4.02km

nomor 4
1 jam =60menit
3 jam= 3x60menit
=180 menit