Question

$\it 10-10\cdot\sqrt2:5\cdot\sqrt2 =?\\\\10-10\sqrt2\ :\ 5\sqrt2 =?$

Answer 1

10 - 10·√2 : 5·√2 =

= 10 - 10·√2·√2/5

= 10 - 10·2/5

= 10 - 20/5

= 10 - 4

= 6

10 - 10√2 : 5√2 = 10 - 2 = 8

Answer 2

1)  $10-10\cdot \frac{\sqrt{2}}{5}\sqrt{2}=10-4=6$

2) $10-10\cdot \frac{\sqrt{2}}{5\sqrt{2}}=10-2=8$