直接写出得数． 6.3+3.7=9-1.8=1.4×0.5=3.9-0.39=0.49÷0.7=1.53+0.8=9.2×0.01=0.25×12=0.51÷0.3=70÷0.5=1.8×8=0.75×4=
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解：6.3+3.7=109-1.8=7.21.4×0.5=0.73.9-0.39=3.510.49÷0.7=0.71.53+0.8=2.339.2×0.01=0.0920.25×12=30.51÷0.3=1.770÷0.5=1401.8×8=14.40.75×4=3
解析分析：根据小数的加减乘除的计算法测进行计算即可．
点评：此题考查了学生小数的口算能力．