怎样简便就怎样算题库
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下面各题怎样简便就怎样算12分
72 ×58 -32 ÷85 1-58 ÷2528 -310
(23 +415 ×56 )÷2021 45 ÷[(35 +12 )×2]
72 ×58 -32 ÷85
= (65+7)(65-7)-32/85
=65^2-49-32/85
=4225-49-32/85
=4175又53/85
1-58 ÷2528 -310
=1-310又58/2528
=-309又58/2528
(23 +415 ×56 )÷2021
=[23+(400+10+5)*56]/2021
=[23+22400+560+280]/2021
=23263/2021
45 ÷[(35 +12 )×2]
=45/94
72 ×58 -32 ÷85 1-58 ÷2528 -310
(23 +415 ×56 )÷2021 45 ÷[(35 +12 )×2]
72 ×58 -32 ÷85
= (65+7)(65-7)-32/85
=65^2-49-32/85
=4225-49-32/85
=4175又53/85
1-58 ÷2528 -310
=1-310又58/2528
=-309又58/2528
(23 +415 ×56 )÷2021
=[23+(400+10+5)*56]/2021
=[23+22400+560+280]/2021
=23263/2021
45 ÷[(35 +12 )×2]
=45/94
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