0.2222✘0.76+0.8888✘0.06用简便方法怎么算
简算．0.2222×0.76+0.8888×0.06 9.9+99.9+999.9+99...
简算．
0.2222×0.76+0.8888×0.06
9.9+99.9+999.9+9999.9+0.4． 展开
0.2222×0.76+0.8888×0.06
9.9+99.9+999.9+9999.9+0.4． 展开
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0.2222×0.76+0.8888×0.06
=0.2222×0.76+0.2222×4×0.06
=0.2222×0.76+0.2222×0.24
=0.2222×（0.76+0.24）
=0.2222×1
=0.2222
=0.2222×0.76+0.2222×4×0.06
=0.2222×0.76+0.2222×0.24
=0.2222×（0.76+0.24）
=0.2222×1
=0.2222
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1、0.2222×0.76+0.8888×0.06
=0.2222×0.76+0.2222×4×0.06
=0.2222×0.76+0.2222×0.24
=0.2222×（0.76+0.24）
=0.2222×1
=0.2222
2、9.9+99.9+999.9+9999.9+0.4
=9.9+99.9+999.9+9999.9+0.1+0.1+0.1+0.1
=（9.9+0.1）+（99.9+0.1）+（999.9+0.1）+（9999.9+0.1）
=10+100+1000+10000
=11110．
=0.2222×0.76+0.2222×4×0.06
=0.2222×0.76+0.2222×0.24
=0.2222×（0.76+0.24）
=0.2222×1
=0.2222
2、9.9+99.9+999.9+9999.9+0.4
=9.9+99.9+999.9+9999.9+0.1+0.1+0.1+0.1
=（9.9+0.1）+（99.9+0.1）+（999.9+0.1）+（9999.9+0.1）
=10+100+1000+10000
=11110．
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