78.9^39.45=78.9^78.9/2=78.9/78.9*2=2
374.88+多等于482.68,可以用482.68-374.88=107.8,也就是374.88+107.8=482.68
78.4+42.5-31.8 =120.9-31.8 =89.1
379.34㎡=0.56901亩 请采纳!
33.6÷0.76
解:375.6+20.87=396.47
77.52÷44=1.76,竖式过程请见图片