5×10⁶+7×10⁴
you have to follow PEMDAS (parentheses, exponents, multiplication, division, addition and subtraction)
so first you would solve the exponents since there is no parentheses (10⁶ and 10⁴) so you would end up with
5x1000000+7x10000
then you multiply 5x1000000 and you would end up with
5000000
5000000+7x10000
multiply 7x10000 and that would give you
70000
5000000+70000
your answer is 5070000
