55.5乘以55加555乘以5.5减550乘以1.1这道题怎么简便计算?
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55.5*55+555*5.5-550*1.1
=55.5(55+10*5.5)-550*1.1
=55.5*110-550*1.1
=11(55.5*10-550*0.1)
=11*500
=5500
=55.5(55+10*5.5)-550*1.1
=55.5*110-550*1.1
=11(55.5*10-550*0.1)
=11*500
=5500
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55.5*55+555*5.5–550*1.1
=555*5.5*2–550*1.1
=5550*1.1–550*1.1
=(5550–550)*1.1
=5000*1.1
=5500
=555*5.5*2–550*1.1
=5550*1.1–550*1.1
=(5550–550)*1.1
=5000*1.1
=5500
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