问题 口算题 口算。3.5+4.5=7.81+0.2=8.7+2.15=69.4-18.1=25.4-11.1=27.1+0.25=78.5+25.1=93.7-13.7=28+15.4=29.1+19.2=30.87-30.07=0.28+1.2=12.5+3.5=9.08-0.08=29.4-19.1=78.5+15.5=45-1.7=29+45.1= 答案 8;8.01;10.85;51.3;14.3;27.35;103.6;80;43.4;48.3;0.8;1.48;16;9;10.3;94;43.3;74.1