186+97+11
=100+80+6+100-3+10+1
=200+87-3
=200+84
=284
186+97+11用简便算法计算
186十97十11
=(186十14)一14十(97十3)十8
=200一14十100十8
=(200十100)一(14一8)
=300一6
=294
186+97+11
=100+80+6+100-3+10+1
=200+87-3
=200+84
=284
186+97+11用简便算法计算
186十97十11
=(186十14)一14十(97十3)十8
=200一14十100十8
=(200十100)一(14一8)
=300一6
=294