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(80+8)*125的简便运算

(80+8)×125 (用简便方法计算) =80×125+8×125 =10000+1000 =11000

(80—8)x125的简便计算 (1)(80—8)x125 =80x125-8x125 =10000-1000 =9000 (2)(80—8)x125 =72x125 =72x(100+25) =72x100+25x72 =7200+7200x0.25 =7200+(7200÷4) =7200+1800 =9000

原式 =80x(8x125) =80x1000 =80000 或者 =(80x125)x8 =10000x8 =80000 供参考。

(36+1)*5/36=5/36 80*125+8*125 =10000+1000 =11000

(125+8)*80 =125x80+8x80 =10000+640 =10640

125×(8+80%+8%) =125x8+125x80%+125x8% =1000+100+10 =1110

(125+8)×80 =125×80+8×80 =10000+640 =10640

red

因为125x8=1000 所以这个思路是口算就可以, 算式可以分解为: 80x125-8x125 =10000-1000 =9000

6×120-(80+8) =720-(80+8) =720-80-8 =640-8 =632

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