(20 Баллов) решите пожалуйста 222,223

222
а)
$0.05 {}^{2} \times 6 = 0.05 \times 0.05 \times 6 = \\ = 0.0025 \times 6 = 0.015$
б)
$12.3 \times 0.1 {}^{3} = 12.3 \times 0.1 \times 0.1 \times \\ \times 0.1 = 12.3 \times 0.001 = 0.0123 \:$
223.
а)
$7.8 \times 2.03 + (2 - 0.63) \times 10.4 = \\ =30.082 \\ 1) \: 7.8 \times 2.03 = 15.834 \\ 2) \: 2 - 0.63 = 1.37 \\ 3) \: 10.4 \times 1 . 37 = 14.248 \\ 4) \: 14.248 + 15.834 = 30.082$
б)
$21.18 + 13.2 \times (7.2 - 3.19) - \\ - 4.5 \times 4.5 = 21.18 + 13.2 \times \\ \times 4.01 - 20.25 = 21.18 + 52.932 - \\ - 20.25 = 53.862 \:$