Question

Calculati:
a)$3 \frac{1}{2}$·$\sqrt{0.0225}$-0.(6)·$\sqrt{1.125*2}$+0.27·$\sqrt{0.09}$
b)0.3·$\sqrt{[0.8(3)]^{2} }$-0.24·$\sqrt{14.0625}$+0.(3)·$\sqrt{0.81}$
Va rog mult sa ma ajutati!!

Answer 1

a)
3 1/2×√0,0225-0,(6)×√(1,125×2)+0,27×√0,09=
=7/2×0,15-6/9×√2,25+0,27×0,3=
=7/2×15/100-2/3×1,5+0,081=
=7/2×3/20-1+0,081=
=21/40-0.919=
=0,525-0.919=
=-0.394


b)
0,3×√[0,8(3)²-0,24×√14,0625+0,(3)×√0,81=
=1/3×0,8(3)-0,24×3,75+1/3×0,9=
=1/3×(83-8)/90-0,9+0,3=
=1/3×75/90-0,6=
=1/3×5/6-0,6=
=5/18-6/10=
=(25-54)/90=
=29/90=0,3(2)