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Haley swam 22 laps each day for 18 days. Then she swam 25 laps each day for 10 days. What was the total number of laps she swam over the 28 days?

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Kaizoku00viz
the total laps for 28 days is just the sum of laps for 18 days and laps for 10 days
which is 22(18) +25(10) = 646 laps
therefore a total 646 laps for 28 days