Question

a,206÷26÷3×45×7:5
b,15-9+-6+119:7​

Answer 1

Resposta:

$206\div \:26\div \:3\cdot \:45\cdot \:7\div \:5\\\\\mathrm{Seguir\:a\:ordem\:PEMDAS\:das\:operacoes}\\\\\mathrm{Multiplicar\:e\:dividir\:\left(da\:esquerda\:para\:a\:direita\right)}\:\:\\\\206\div \:26=\frac{206}{26}\\\\=\frac{206}{26}\div \:3\cdot \:45\cdot \:7\div \:5\\\\=\frac{103}{39}\cdot \:45\cdot \:7\div \:5\\\\=\frac{1545}{13}\cdot \:7\div \:5\\\\=\frac{10815}{13}\div \:5\\\\=\frac{2163}{13}\\\\=166\frac{5}{13}$

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$15-9+\left(-6+119\div \:7\right)\\\\\mathrm{Seguir\:a\:ordem\:PEMDAS\:das\:operacoes}\\\\-6+119\div \:7\\\\-6+17\\\\11\\\\15-9+11\\\\15-9=6\\\\6+11=17\\\\=17$