Just convert the 1 and 1/2 to a fraction and then multiply the top and bottom (numerator and denominator) by 5 to see that fraction in tenths.
Multiplying both the numerator and the demominator of a fraction by the same number does not change the value of the fraction.
1 1/2 is the same as 3 / 2
Now multiply both top and bottom by 5.
3 / 2 = 15 / 10
Therefore there are 15 tenths in 1 1/2.
Good luck I hope this helps.
Joe.
11/2 = 5,5
5 Units
5 Tenths
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