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12(860+24012)簡便計算

12×860十12x24012二12×(8o0十6O)十12X(2o0O0十4oo0十10十2)二9600十72O十2400O0十48000十120十24二1O320+240000+48000+120+24二Ⅰ250320+48000+120+24二298464

=125×(860+20) =125×880 =110000

請告訴我后半個括號在哪兒

125×(860+240÷12) =125×800+125×(60+240÷12) =100000+125×(60+20) =100000+125×80 =100000 +10000 =110000

125(860+24012)怎么簡便怎么算 125*(860+240÷12) =125*(860+20) =125*880 =125*8*110 =110000

沒有簡便算法。 (860十240÷12)÷40 =(860+20)÷40 =880÷40 =22

解: 120×(860+240÷12) =120×(860+20) =120×880 =105600

=860+240 =1100

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