19) Calculați câtul dintre pătratul lui 2¹⁰şi dublul lui 2¹⁰.
20) Determinați suma cifrelor numerelor:
a)5²⁰¹¹×16⁵⁰³ b)50²⁰×2²⁸
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Răspuns:
19.
[tex]( {2}^{10} )^{2} \div 2 \times {2}^{10} = {2}^{20} \div {2}^{11} = {2}^{20 - 11} = {2}^{9} [/tex]