Saturday, 8 February 2014

ARITHMETICS A8

Evaluate  20 + 6 – 5 – 7 – 9 + 5.

Solution

= 20 + 6 – 5 – 7 – 9 + 5

= 20 + 6 + 5 – 5 – 7 – 9

= 20 + 6 + 5 – ( 5 + 7 + 9)

= 31 – 21

= 10


TRY THIS.............


Evaluate  30 + 6 – 4 – 7 – 11 + 8

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