Question

genteee pfvv me ajudem escreva o resultado em notação:
a)0,0043 x 10000
b)12500 x 0,0004
c) 1,25x10/4 : 5x10/3
d)1,47x10/5 : 3x10/3
e) 1,47x10/3 + 3,7x10/2
f) 1,47x10/4 + 3,7x10/2
g) 1,47x10/3 + 3,7x10/2

Answer 1

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$\tt{a)}~\sf{0,0043\cdot10000=4,3\cdot10^{-3}\cdot10^4=4,3\cdot10^1}\\\tt{b)}~\sf{12500\cdot0,0004=1,25\cdot10^4\cdot10^{-4}=1,25\cdot10^1}\\\tt{c)}~\sf{1,25\cdot\dfrac{10}{4}\div5\cdot\dfrac{10}{3}}\\\sf{\diagdown\!\!\!\!</p><p>1,25^{0,25}\cdot\dfrac{\diagdown\!\!\!\!10}{4}\cdot\dfrac{3}{\diagdown\!\!\!\!</p><p>5\cdot\diagdown\!\!\!\!10}}\\\sf{=\dfrac{3,75}{4}=0,9375=9,375\cdot10^{-1}}\\\tt{d)}~\sf{1,47\cdot\dfrac{10}{5}\div3\cdot\dfrac{10}{3}}\\\sf{1,47\cdot\dfrac{\diagdown\!\!\!\!</p><p>10}{5}\cdot\dfrac{\diagdown\!\!\!\!</p><p>3}{\diagdown\!\!\!\!</p><p>3\cdot\diagdown\!\!\!\!</p><p>10}=\dfrac{1,47}{5}=0,294}\\\sf{2,94\cdot10^{-1}}\\\tt{e)}~\sf{1,47\cdot\dfrac{10}{3}+3,7\cdot\dfrac{10}{2}=\dfrac{14,7}{3}+\dfrac{37}{2}}\\\sf{\dfrac{29,4+111}{6}=\dfrac{140,4}{6}=23,4}\\\sf{=2,34\cdot10^1}\\\tt{f)}~\sf{1,47\cdot\dfrac{10}{4}+3,7\cdot\dfrac{10}{2}=\dfrac{14,7}{4}+\dfrac{37}{2}}\\\sf{\dfrac{29,4+148}{8}=\dfrac{177,4}{8}=22,175}\\\sf{2,2175\cdot10^1}\\\tt{g)}~\sf{\acute{e}~a~mesma~soluc_{\!\!,}\tilde{a}o~da~letra~e}$