问题 口算题 口算。46.7-29.3=5.9+1.6=52.4-1.3=1.38+4.5=5-0.62=7.08+.6-0.92=5.02-3.9+0.65= 答案 17.4；7.5；51.1；5.88；4.38；6.76；1.77
