Question

10×(-2)-7×(-1)-5×2+7​

Answer 1

10×(-2)-7×(-1)-5×2+7​

$=-20-7\times \left(-1\right)-5\times \:2+7$

$=-20-\left(-7\right)-5\times \:2+7$

$=-20-\left(-7\right)-10+7$

= - 16