几道简便运算!^o^~(1)1.25*17.6+36.1/0.8+2.36*12.5(《精彩假期》P18)(2)7.5*2.3+1.9*2.5(《精彩假期》P18)(3)2004/2003*2005(《精彩假期》P22)(4)276*543-267/276+543*275(《精彩假期》P22)(5)17/5
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![几道简便运算!^o^~(1)1.25*17.6+36.1/0.8+2.36*12.5(《精彩假期》P18)(2)7.5*2.3+1.9*2.5(《精彩假期》P18)(3)2004/2003*2005(《精彩假期》P22)(4)276*543-267/276+543*275(《精彩假期》P22)(5)17/5](/uploads/image/z/8785265-41-5.jpg?t=%E5%87%A0%E9%81%93%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%21%5Eo%5E%7E%EF%BC%881%EF%BC%891.25%2A17.6%2B36.1%2F0.8%2B2.36%2A12.5%EF%BC%88%E3%80%8A%E7%B2%BE%E5%BD%A9%E5%81%87%E6%9C%9F%E3%80%8BP18%EF%BC%89%EF%BC%882%EF%BC%897.5%2A2.3%2B1.9%2A2.5%EF%BC%88%E3%80%8A%E7%B2%BE%E5%BD%A9%E5%81%87%E6%9C%9F%E3%80%8BP18%EF%BC%89%EF%BC%883%EF%BC%892004%2F2003%2A2005%EF%BC%88%E3%80%8A%E7%B2%BE%E5%BD%A9%E5%81%87%E6%9C%9F%E3%80%8BP22%EF%BC%89%EF%BC%884%EF%BC%89276%2A543-267%2F276%2B543%2A275%EF%BC%88%E3%80%8A%E7%B2%BE%E5%BD%A9%E5%81%87%E6%9C%9F%E3%80%8BP22%EF%BC%89%EF%BC%885%EF%BC%8917%2F5)
几道简便运算!^o^~(1)1.25*17.6+36.1/0.8+2.36*12.5(《精彩假期》P18)(2)7.5*2.3+1.9*2.5(《精彩假期》P18)(3)2004/2003*2005(《精彩假期》P22)(4)276*543-267/276+543*275(《精彩假期》P22)(5)17/5
几道简便运算!^o^~
(1)1.25*17.6+36.1/0.8+2.36*12.5(《精彩假期》P18)
(2)7.5*2.3+1.9*2.5(《精彩假期》P18)
(3)2004/2003*2005(《精彩假期》P22)
(4)276*543-267/276+543*275(《精彩假期》P22)
(5)17/51+ (68/1+51/2)*17(《精彩假期》P26)
(6)(3.25-0.8*8/5)/(6又4/1-3.5)(《精彩假期》P38)
(7)1*2/1+2*3/1+3*4/1……98*99/1+99*100/1(《精彩假期》P38)
(8)(5又2/1-2.75)/[(7/2+2又2/1)*13/7](《精彩假期》P40)
(9)17*[1又3/1+1.5/1又4/1]
几道简便运算!^o^~(1)1.25*17.6+36.1/0.8+2.36*12.5(《精彩假期》P18)(2)7.5*2.3+1.9*2.5(《精彩假期》P18)(3)2004/2003*2005(《精彩假期》P22)(4)276*543-267/276+543*275(《精彩假期》P22)(5)17/5
(1)1.25*17.6+36.1/0.8+2.36*12.5
1.25*17.6+36.1/0.8+2.36*12.5
=(5/4)*17.6+36.1*(5/4)+23.6*(50/4)
=176/8+361/8+236/8
=773/8=96.625
(2)7.5*2.3+1.9*2.5
7.5*2.3+1.9*2.5
=7.5*(1.9+0.4)+1.9*2.5
=(7.5+2.5)*1.9+7.5*0.4
=19+3 =22
(3)2004/2003*2005
2004/2003*2005
=(2004/2003)*(2003+2)
=2004+4008/2003
(4)276*543-267/276+543*275
276*543-267/276+543*275
=543*(276+275)-267/276
=543*551-267/276
(5)17/51+ (68/1+51/2)*17
17/51+ (68/1+51/2)*17
后面的做不下去了,好像有一些没有简便方法,不知道你题目有没有抄错,你的68/1中的68是分子还是分母呀?应该是分母都对
(6)(3.25-0.8*8/5)/(6又4/1-3.5)
是6又1分之4吗?应该是6又4分之1吧
(7)1*2/1+2*3/1+3*4/1……98*99/1+99*100/1
(8)(5又2/1-2.75)/[(7/2+2又2/1)*13/7]
(9)17*[1又3/1+1.5/1又4/1]
余下的你慢慢做吧,好像都不是太难的.假期长着呢,空的时候做做也不错呀.