Tính bằng cách thuận tiện nhất
3/ Tính bằng cách thuận tiện nhất: (1đ)
1,75 giờ x 4 + 2 giờ 15 phút x 4 – 78 phút x 4
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
giúp mik vs ạ, mik cần gấp!
1,75 giờ x 4 + 2 giờ 15 phút x 4 – 78 phút x 4
................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
giúp mik vs ạ, mik cần gấp!