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1、口算13.0210= 0.251000= 0.007100= 31.710=1100= 0.624100= 981000= 53.4100=1.26+3.74= 4.322.3= 8.970.31= 6.545.4=1.25+4.75= 8.73+2.27= 80.7= 4.22.8=0.09+10.1= 8.51.5= 6.2+8= 12.82.4=6.5+4.5= 103.9= 1.7+12.3= 9.2+1.8=0.5610= 42.5= 1.24= 0.86=2.72= 0.24= 0.80.4= 0.50.14=3.5+6.5= 10.5= 3.8+1.2= 1.70.4=0.124
2、= 0.254= 1.250.8= 0.080.2=9.8+10.2= 2.5+7.5= 1.258= 254=0.6410= 3606= 4207= 8109=109.1= 2.7+12.3= 5.7+4.3= 31.99=4.4+5.6= 9.75.2= 0.5+4.6= 3.3+4.05=11000= 0.63410= 781000= 5.67100=8.88100= 10.47100= 1.005100= 731000=7.0610= 0.7891000= 7.004100= 0.0110=1.36+3.63= 4.422.3= 8.880.31= 6.545.4=1.55+4.45=
3、 60.5= 4.32.5= 0.08+10.1=1.1+0.12= 22.4+0.6= 0.03+0.6= 0.70.61=口算220.99= 3.4+5.6= 9.75.2= 71.9=80.9= 4.50.5= 3.7+6.3= 4.5+1.5=0.360.2= 12.58= 0.60.7= 2.58=0.30.3= 1.258= 2.45= 0.16.7=5.2+2.5= 5.63.3= 90.7= 0.9+0.07=4.22.8= 4.75+2.25= 1.01+3.99= 8.50.5=0.3500= 7.84 0= 0.40.8= 0.322=0.83= 1.258= 0.08
4、4= 0.31 4= 3.5+6.5= 100.6= 3.8+2.2= 1.40.6=42.310= 6.48100= 58.6100= 5.34100=3.02100= 0.251000= 0.007100= 31.710=7.25+0.75= 2.6+7.4= 8.09+1.99= 9.37.2=8.52.5= 6.4+5= 12.42.2= 4.5+6.5=3.6+7.4= 15.5+14.5= 2.75+1.25= 9.62+0.38=5.2+2.5= 3.3+5.6= 12.642.64= 1.2+0.3=0.561000= 250.4= 0.124= 72.510=0.84= 0.60.7= 0.30.3= 1.258=0.16.7= 0.3500= 3.450= 0.6310=9.5+0.5= 100.5= 24.99= 0.323=5.5+5= 0.084= 1.10.9= 700.02=