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b) - 2 1/2 * 8 - (- 2/15 ) = -5/2 * 8 + 2/15 = -20 + 2/15 = - 19 i13/15
b)-2 1/2*8-(-2/15)=5/2*8/1-(-2/15)=5/2 *8/1+2/15=5/2*10/16=50/32=1 18/32
mam nadzieję że pomogłam:D