\( 168-30+30-32+225 = \)
\( 168 - 32 + 225 = 136 + 225 = 361 \)
\( 7^2 = 49 \)
\( 49 - 9845 = -9796 \)
\( -9796 - 0 = -9796 \)
\( 73 : (-9796) \approx -0.00745 \)
\( 497-3+7-497 - 0.00745 + 15 = \)
\( 494 + 7 - 497 - 0.00745 + 15 = \)
\( 501 - 497 - 0.00745 + 15 = \)
\( 4 - 0.00745 + 15 = 19 - 0.00745 = 18.99255 \)
Ответ: а) 361; б) 18.99255