Question

6.5 ÷0.5+0.5 x 2 - 4= ?​

Answer 1

Answer:

$\dfrac{6.5}{0.5}+0.5\times \:2-4=10$

Explanation:

$\dfrac{6.5}{0.5}+0.5\times \:2-4$

$\gray{\mathrm{Multiply\:the\:numbers:}\:0.5\times \:2=1}$

$=\dfrac{6.5}{0.5}+1-4$

$\gray{\mathrm{Add/Subtract\:the\:numbers:}\:1-4=-3}$

$=\dfrac{6.5}{0.5}-3$

$\gray{\mathrm{Convert\:element\:to\:fraction}:\quad \:3=\dfrac{3\times \:0.5}{0.5}}$

$=-\dfrac{3\times \:0.5}{0.5}+\dfrac{6.5}{0.5}$

$\gray{\mathrm{Since\:the\:denominators\:are\:equal,\:combine\:the\:fractions}:\quad \dfrac{a}{c}\pm \dfrac{b}{c}=\dfrac{a\pm \:b}{c}}$

$=\dfrac{-3\times \:0.5+6.5}{0.5}$

$\gray{-3\times \:0.5+6.5=5}$

$=\dfrac{5}{0.5}$

$\gray{\mathrm{Divide\:the\:numbers:}\:\dfrac{5}{0.5}=10}$

$=10$