Question

please answer these questions.
its very important....
its not my test but my worksheets
please help me.

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Answer 1

Answer:

hope this helps you....

Answer 2

Answer:

1) 1/3+2/6+1/9

=Lcm of 3,6,9 is 18

=1×6/3×6+2×3/6×3+1×2/9×2

=6+6+2

18

14/18

2) 2/5+1/8+2/10

=Lcm of 5,8,and 10 is 40

=2×8/5×8+1×5/8×5+2×4/10×4

= 16+5+8

40

29/40

3) 3/10-1/15

= Lcm of 10 and 15 is 30

= 3×10/10×3-1×2/15×2

=30-2

30

28/30

4) 4/6+2/5-1/8

=Lcm of 6,5 and 8 is 240

=4×40/6×40+2×48/5×48-1×30/8×30

=160+96-30

240

=226/240