简算题的方法怎么算。快,十万火急!!!
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7.32-7/12+2.68-1/4 5/8+(22/27-5/8)
=(7.32+2.68)-(7/12+1/4)
=(5/8-5/8)+22/27
=10-10/12 =22/27
=9又5/6
11/9-5/7+7/9-2/7
=(11/9+7/9)-(5/7+2/7)
=2-1
=1
1994×1992/1993
=(1993+1)(1993-1)/1993
=(1993²-1)/1993
=1993-1/1993
=1992又1992/1993
1.999+19.99+199.9+1999
=2+20+200+2000-0.001-0.01-0.1-1
=2222-1.111
=2220.889
=(7.32+2.68)-(7/12+1/4)
=(5/8-5/8)+22/27
=10-10/12 =22/27
=9又5/6
11/9-5/7+7/9-2/7
=(11/9+7/9)-(5/7+2/7)
=2-1
=1
1994×1992/1993
=(1993+1)(1993-1)/1993
=(1993²-1)/1993
=1993-1/1993
=1992又1992/1993
1.999+19.99+199.9+1999
=2+20+200+2000-0.001-0.01-0.1-1
=2222-1.111
=2220.889
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