问题 解答题 看谁口算又对又快.230+680=300×6=360+70=0×189=56÷7=350-260=12×6=160×4=0÷9=15+45=19+19=1-78= 答案 230+680=910300×6=1800360+70=4300×189=056÷7=8350-260=9012×6=72160×4=6400÷9=015+45=119+19=291-78=18故答案为:910,1800,430,0,8,90,72,640,0,1,29,18.