Вычислите: 1) √360*490 2) √331776 3) √45*80*0,16 4) √3,6*810

1)
$\sqrt{360 \times 490}$
=
$\sqrt{36 \times 100 \times 49}$
=6×10×7=420
2)
$\sqrt{331776}$
=
$\sqrt{36 \times 36 \times 16 \times 16}$
=36×16=576
3)
$\sqrt{45 \times 80 \times 0.16}$
=
$\sqrt{45 \times 8 \times 1.6}$
=
$\sqrt{360 \times 1.6}$
=
$\sqrt{36 \times 16}$
=6×4=24
4)
$\sqrt{3.6 \times 810}$
=
$\sqrt{36 \times 81}$
=6×9=54