Maths consolidation question

Last week, Maya and Gabriela decided to see how fast they could sprint 400 meters. They asked their friend Jessica to time them with a stopwatch. After 4.72 minutes, Jessica agreed to time the runners. Maya sprinted first and ran 400 meters in 76.39 seconds. When it was Gabriela's turn, she sped off and completed the run in 72.69 seconds.How much faster was Gabriela than Maya in seconds? 04.30

5.3+4.7=9.10

5.0+4.0=9.0

0.3+0.7=0.10

5.31+4.77=10.80

5.00+4.00=9.0

0.31+0.77= 1.80

5.31+0.477= 5.787

5.00+0.400=5.400

0.31+0.077= 0.387

53.1−47.8 = 14.5

50.0--40.0 = 10.0

3.1 - 7.8 = 4.5

5.31−4.78 = 1.47

5.0 - 4.0 = 1.0

0.31 - 0.78 = 0.47

5.31−0.478 = 5.168

0.31-0.478=0.168

Just add the five