5.75+3.25×7.8÷0.5是先算乘除再算加减。所以3.25×7.8÷0.5=50.7，再加5.75=50.7+5.75=56.45。
5.75+3.25×7.8÷0.5=5.75+3.25÷0.5x7.8=5.75+6.5x7.8=5.75+50.7=56.45
原式＝5.75十3.25÷0.5x7.8＝5.75十6.5x7.8＝5.75十50.7＝56.45
