3.52x0.79-0.173x7.9+1.79x0.21简便运算
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3.52×0.79-0.173×7.9+1.79×0.21
=3.52×0.79-1.73×0.79+1.79×0.21
=(3.52-1.73)×0.79+1.79×0.21
=1.79×0.79+1.79×0.21
=1.79×(0.79+0.21)
=1.79×1
=1.79
=3.52×0.79-1.73×0.79+1.79×0.21
=(3.52-1.73)×0.79+1.79×0.21
=1.79×0.79+1.79×0.21
=1.79×(0.79+0.21)
=1.79×1
=1.79
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展开全部
3.52x0.79-0.173x7.9+1.79x0.21
=3.52x0.79-1.73x0.79+0.79x0.21+0.21
=(3.52 -1.73+0.21)x0.79+0.21
=2x0.79+0.21
=1.79
=3.52x0.79-1.73x0.79+0.79x0.21+0.21
=(3.52 -1.73+0.21)x0.79+0.21
=2x0.79+0.21
=1.79
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