11. Simplify:
(1/2×1/4) -(1×1/4)+ (-7/18÷ 7/-15)
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Answer:
(1/2×1/4) -(1×1/4)+ (-7/18÷ 7/-15)
=(1/8)-(1/4)+(-7/18*-15/7)
=1/8-1/4+(-15/-18)
=1/8-1/4+15/18
=9-15+60/72 (lcm)
=69-15/72
=54/72=3/4
hope it will help.
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