直接写出得数练习题398+102= 400-139= 0.88+0.22= 358-192= 1-0.45=203-102= 10-0.99= 1993+1994= 2.63+3.7= 12-7.9= 352+198= 98-0.23-0.77= 1997+1998+1999+6= 1.03+0.07= 2005+620=1-0.09= 5-2.6-1.4= 13.3+4.7= 2.06+3.94= 10-4.5-5.5= 60339 495051 160.25= 199-109= 20.2499.92930056= 0.52100= 12.50.08= 0.9+990.9= 7.80.254=3500.02= 20.02= 0.1253225= 0.12598= 19.8+305398535 47548 49.98.1 48.52.5= 49007172348.02 81.6= 18.9101-18.9= 41807 0.1250.98= 6.6-6.60= 8 1-25%= 1+15%= 1-32%=110%= 0.7:0.25= 3625%= 5.213%= 105%=0.1+0.990.1= 0.550%= 0.25:0.1= 0.920%= 2.5:1.5=250%+32= 999951 80.92.4 0.01475= 8970.001=