Question

đặt tính rồi tính:

2 giờ 16 phút+4 phút 30 giây

Answer 1

136 giây

+ 

270 giây

406 giây

Answer 2

  2 giờ 16 phút

+          4 phút 30 giây

_____________________

  2 giờ 20 phút 30 giây

Answer 3

2 giờ 16 phút + 4 phút 30 giây = 6 phút 46 giây

Answer 4

      8160 giây

+ 

      270 giây

     8430

k mình nha mình đẫ mất công làm rồi

Answer 5

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