﹙四又四分之一×6.56＋3.44×7.75－3.44×3.5﹚÷0.425
=【四又四分之一×6.56＋3.44×（7.75－3.5﹚】÷0.425
=【4.25×6.56＋3.44×4.25】÷0.425
=4.25×（6.56+3.44）÷0.425
=4.25×10÷0.425
=42.5÷0.425
=100