简便计算:2.9×0.58+5.8×0.21

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简便计算:2.9×0.58+5.8×0.21
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简便计算:2.9×0.58+5.8×0.21
简便计算:2.9×0.58+5.8×0.21

简便计算:2.9×0.58+5.8×0.21
2.9×0.58+5.8×0.21
=5.8×(0.29+0.21)
=5.8×0.5
=2.9;
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2.9×0.58+5.8×0.21=5.8×0.29+5.8×0.21
=5.8×(0.29+0.21)
=5.8×0.5
=2.9