exam Maths Puzzle Numerical Ability

My son and I keep getting different answers

10/2 - |-8+3| =

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exam Other Question

find two consecutive even numbers whose product is 288 could someone help me solve these equations and write the result in scientific notation..

(3.86x10^15)*(2.15x10^-7)

and

(3.86x10^15)/(4.15x10^-7)

Thanks in advance for your help!