题目

递等式计算，能简便的要简便计算。 ①0.25×6.4×1.25 ②（9.8-4.6）÷0.13×2.5 ③5.6×2.9-5.6+8.1×5.6 ④27.08×10.1 ⑤10.7-2.9×0.2÷0.58 ⑥101÷[（100.1-99.09）×10] 答案：①0.25×6.4×1.25=0.25×8×0.8×1.25=（0.25×8）×（0.8×1.25）=2×1=2②（9.8-4.6）÷0.13×2.5=（9.8-4.6）÷0.13×2.5=5.2÷0.13×2.5=40×2.5=100③5.6×2.9-5.6+8.1×5.6=5.6×（2.9-1+8.1）=5.6×10=56④27.08×10.1=27.08×（10+0.1）=27.08×10+27.08×0.1=270.8+2.708=273.508⑤10.7-2.9×0.2÷0.58=10.7-0.58÷0.58=10.7-1=9.7⑥101÷[（100.1-99.09）×10]=101÷[1.01×10]=101÷10.1=10

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