book Maths Puzzle Numerical Ability

what if I have one and two fifths plus two thirds what do i do know if i have to add them

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The supplement of an angle is 20 degrees larger that the angle. Find the measure of the angle. Thanks for the help! The combined annual cost of the U.S. and Russian space program is approximately $71 billion. The U.S. program is $19 billion less than the Russian program. What is the apporximate