8.32×34+8.32×66
=8.32×（34＋66）
=8.32×100
=832
37.5÷25+62.5÷25
=37.5×1/25＋62.5×1/25
=(37.5＋62.5)×1/25
=100×1/25
=4
7.25-0.68-6.25
=7.25－6.25－0.68
=1－0.68
=0.32