11×91+209×998+627简算

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11×91+209×998+627简算

11×91+209×998+627简算
11×91+209×998+627简算

11×91+209×998+627简算
11×91+209×998+627
=(10+1)x91+209x(1000-2)+627
=910+91+209000-418+627
=210210

11×91+209×998+627
=11*(100-9)+209*(1000-2)+627
=100*11-9*11+209*1000-209*2+627
=1100-99+209000-418+627
=(1100+209000+627)-(99+148)
=210727-147
=210580

原式=1001+209×(1000-2)+209×3
=1001+209×(1000-2+3)
=1001+209×1001
=1001×(209+1)
=1001×210
=210210

望采纳,谢谢!

11×91+209×998+627
=1001+209×998+209×3
=1001+209×(998+3)
=1001+209×1001
=(1+209)×1001
=210×1001
=210210

=11*91+209*998+209*2+209
=11*91+209*(998+2)+11*19
=11*(91+19)+209*1000
=11*110+209*1000
=1210+209000
=210210

=11*91+209*998+3*209
=11*91+209*﹙998+3﹚
=11*91+209*1000+209
=91*10+91+209+209000
=910+300+209000
=210210

1001+209×(1000-2)+209×3
=1001+209×(1000-2+3)
=1001+209×1001
=1001×(209+1)
=1001×210
=210210

11*(100-9)+209*(1000-2)+627
=(1100-99)+(209000-418)+627
=1001+208582+627=1628+208582
=230210