Question

10 • (1/2)²+9 • 1/2 =
0,9 • (-10)²-120 =
С решением

Answer 1

1)
$(\frac{1}{2 } )^{2} = \frac{1}{2} \times \frac{1}{2} = \frac{1}{4}$
$10 \times \frac{1}{4} = \frac{5}{2}$
$9 \times \frac{1}{2} = \frac{9}{2}$
$\frac{5}{2} + \frac{9}{2} = \frac{14}{2} = 7$
2)
$( { - 10)}^{2} = 100$
$0.9 \times 100 = 90$
$90 - 120 = - 30$