c) 23.17-23.14
=23(17-14)
=8.3
=24
d)35.48+65.68+20.35
=121.51
\(2^3.17-2^3.14\\ =8.17-8.14\\ =8.\left(17-14\right)\\ =8.3\\ =24\)
\(35.48+65.68+20.35\\ =35.48+20.35+65.68\\ =35.\left(48+20\right).65.68\\ =35.68+65.68\\ =68.\left(35+65\right)\\ =68.100\\ =6800\)