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2022-03-29 21:04:41
a) Đổi: 2 giờ 30 phút = 2,5 giờ.
Vận tốc của ô tô là:
120 : 2,5 = 48 (km/giờ)
b) Nửa giờ = 0,5 giờ.
Quãng đường từ nhà Bình đến bến xe dài số ki-lô-mét là:
15 × 0,5 = 7,5 (km)
c) Thời gian người đi bộ đi quãng đường 6km là:
6 : 5 = 1,2 (giờ)
1,2 giờ = 1 giờ 12 phút.
Đáp số: a) 48km/giờ ;
b) 7,5km;
c) 1 giờ 12 phút.
2022-03-29 20:56:21
1/2+5/4=2/4+5/4=2+5/4=7/4
2022-03-29 20:54:45
2022-01-08 19:58:59
2022-01-08 19:58:59
2022-01-08 19:58:59