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Kate is using fraction strips to add ##4/10## and ##4/5##. She uses one whole strip to represent the sum. How many fifths strips does she need to complete the sum?
Six
Four tenths strips represent ##4/10##. These are equivalent to 2 fifths strips. Now ##4/5## equal to 4 fifths strips. Thus to add the given fractions Kate has to use (2+4)= 6 fifths strips.