Đồng hồ đếm ngược 90 giây, 60 giây, 30 giây, 15 giây chèn vào các slide

3029282726252423222120191817161514131211109876543210 ĐỒNG HỒ ĐẾM NGƯỢC _ POWER POINT 30 giây 3029282726252423222120191817161514131211109876543210 3029282726252423222120191817161514131211109876543210 3029282726252423222120191817161514131211109876543210 1514131211109876543210 15 GIÂY 15 giây 6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 60 GIÂY 60 giây 9089888786858483828180797877767574737271706968676665646362616059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 90 GIÂY 90 giây . 1514131211109876543210 15 GIÂY 15 giây 605 9585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 60 GIÂY 60 giây 908 98887868584838281807978777675747372717069686766656463626 1605 9585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 90. 908 98887868584838281807978777675747372717069686766656463626 1605 9585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 90 GIÂY 90 giây