plis pake cara plis tolong

15.
ibu membeli 2 potong pita masing2 2,5m dan 120 dm
dipakai untuk hiasan taplak 325 cm

semua diubah menjadi cm
2,5m = 2,5 x 100 = 250 cm
120 dm = 120 x 10 = 1200 cm
325 = 325 cm (tetap)

1200 + 250 - 325 = 1.125cm (C)

16. 1/4m^3 diubah menjadi liter
keterangan : liter = dm^3
1/4 x 1000 = 250 liter

jadi semua dikurangi
250 - 7 - 12 - 15 = 216 liter (A)

17. ca = m^2
are = dam^2
8,5 are = 8,5 dam^2 = 8,5 x 100 = 850 m^2
luas seluruhnya =
560 m^2 + 450 m^2 + 850 m^2
= 1.860 m^2 (D)

15. total pita yang dibeli oleh ibu
= 2,5 m + 120 dm
= 250 cm + 1200 cm
= 1450 cm

Sisa pita
= 1450 cm - 325 cm
= 1125 cm (c)

16. 1 m^3 = 1000 L
1 dm^3 = 1 L

Sisa minyak tanah
= 1/4 m^3 - (12 dm^3 + 7 L + 15 L)
=(1/4 × 1000) L - (12 L + 7 L + 15 L)
= 250 L - 34 L
= 216 L (a)

17. 1 are = 100 m^2
1 ca = 1 m^2

Total luas
= 560 m^2 + 450 ca + 8,5 are
= 560 m^2 + 450 m^2 + (8,5 × 100) m^2
= 560 m^2 + 450 m^2 + 850 m^2
= 1860 m^2 (d)