除法简便运算练习题58*146/58*45-58

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除法简便运算练习题58*146/58*45-58
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除法简便运算练习题58*146/58*45-58
除法简便运算练习题58*146/58*45-58

除法简便运算练习题58*146/58*45-58
=58*146/58*45-58*58*45/58*45=(58*146-58*58*45)/58*45=58(146-58*45)/58*45
=(146-58*45)/45=146/58-45=-42.482758620689

58*146/58*45-58
=146/45 -58
=(135+11)/45 -58
=3+11/45 -58
=11/45 -55
=-54-34/45
=-54 34/45

58*146/58*45-58
=146*45-58
=146/2*45*2-58
=73*90-58
=6570-58
=6512

简便运算练习