(4.3+7.9)×5.8-10.54怎么简算?
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(4.3+7.9)×5.8-10.54
=12.2×5.8-10.54
=(10+2+0.2)×5.8-10.54
=10×5.8+2×5.8+0.2×5.8-10.54
=58+11.6+1.16-10.54
=58+(12.76-10.54)
=58+2.22
=60.22
=12.2×5.8-10.54
=(10+2+0.2)×5.8-10.54
=10×5.8+2×5.8+0.2×5.8-10.54
=58+11.6+1.16-10.54
=58+(12.76-10.54)
=58+2.22
=60.22
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