六点9+1点9×0点2÷7点六5.95÷(1.2+0.5)x5的简便计算？
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6.9+1.9X0.2÷7.6
=6.9+0.38÷38÷0.2
=6.9+0.01÷0.2
=6.9+0.05
=6.95
5.95÷(1.2+0.5)X5
=5X5.95÷1.7
=5X5.1÷1.7+5X0.85÷1.7
=5X3+5X0.5
=15+2.5
=17.5
=6.9+0.38÷38÷0.2
=6.9+0.01÷0.2
=6.9+0.05
=6.95
5.95÷(1.2+0.5)X5
=5X5.95÷1.7
=5X5.1÷1.7+5X0.85÷1.7
=5X3+5X0.5
=15+2.5
=17.5
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