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(125+9)x8用简便方法计算

(125+9)x8用简便方法计算 (125+9)x8 =125x8+9x8 =1000+72 ...

(125+9)×8 =125×8+9×8 =1000+72 =1072

(125+9)x8 =(125+10-1)x8 =125x8+10x8-8 =1000+80...

在这个计算中,9.9是一个不整齐的数,可以把它安10减0.1来对待,那么上题125×9.9就等于12...

=8乘以125乘以9=1000乘以9=9000

48*125*9 =(6*8)*125*9 =(8*125)*(6*9) =1000*54 ...

=8×125+8×9 =1000+72 =1072

125×9 =125×(8+1) =125×8+125 =1000+125 =1125

125×9×8 解:简便算法 =125x8x9 =1000x9 =9000 祝学习进步

125✘9-125 =125x(9-1) =125x8 =1000

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