直接写出得数． 5.03+15.7=10-9.03=1.07×0.06=11.2×0.4=2.15×3=3÷4=5.2÷0.4=1.2÷0.8=2.5×6.2×0.4=17.1×2.4+17.1×7.6=
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解：5.03+15.7=20.7310-9.03=0.971.07×0.06=0.064211.2×0.4=4.482.15×3=6.453÷4=0.755.2÷0.4=131.2÷0.8=1.52.5×6.2×0.4=6.217.1×2.4+17.1×7.6=171
解析分析：根据小数四则运算的计算方法进行计算，能用简便算法的用简便算法．据此解答．
点评：本题主要考查了学生小数四则运算的计算能力．