小学奥数举一反三六年级B版第四周的简便运算(3)的提高卷7道题1、4/33×133 2、 2000/2001×2002 3、13又1/5 ×5/6+28又2/7×7/9 4、4/13×2+1/13×6+2/13×6 5、1/11×6+3/11×7+2×3/11 6、5/11×1/20+3/11×1/2+5/11×1/5 7、
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![小学奥数举一反三六年级B版第四周的简便运算(3)的提高卷7道题1、4/33×133 2、 2000/2001×2002 3、13又1/5 ×5/6+28又2/7×7/9 4、4/13×2+1/13×6+2/13×6 5、1/11×6+3/11×7+2×3/11 6、5/11×1/20+3/11×1/2+5/11×1/5 7、](/uploads/image/z/131939-35-9.jpg?t=%E5%B0%8F%E5%AD%A6%E5%A5%A5%E6%95%B0%E4%B8%BE%E4%B8%80%E5%8F%8D%E4%B8%89%E5%85%AD%E5%B9%B4%E7%BA%A7B%E7%89%88%E7%AC%AC%E5%9B%9B%E5%91%A8%E7%9A%84%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%EF%BC%883%EF%BC%89%E7%9A%84%E6%8F%90%E9%AB%98%E5%8D%B77%E9%81%93%E9%A2%981%E3%80%814%2F33%C3%97133+2%E3%80%81+2000%2F2001%C3%972002+3%E3%80%8113%E5%8F%881%2F5+%C3%975%2F6%2B28%E5%8F%882%2F7%C3%977%2F9+4%E3%80%814%2F13%C3%972%2B1%2F13%C3%976%2B2%2F13%C3%976+5%E3%80%811%2F11%C3%976%2B3%2F11%C3%977%2B2%C3%973%2F11+6%E3%80%815%2F11%C3%971%2F20%2B3%2F11%C3%971%2F2%2B5%2F11%C3%971%2F5+7%E3%80%81)
小学奥数举一反三六年级B版第四周的简便运算(3)的提高卷7道题1、4/33×133 2、 2000/2001×2002 3、13又1/5 ×5/6+28又2/7×7/9 4、4/13×2+1/13×6+2/13×6 5、1/11×6+3/11×7+2×3/11 6、5/11×1/20+3/11×1/2+5/11×1/5 7、
小学奥数举一反三六年级B版第四周的简便运算(3)的提高卷7道题
1、4/33×133 2、 2000/2001×2002 3、13又1/5 ×5/6+28又2/7×7/9 4、4/13×2+1/13×6+2/13×6 5、1/11×6+3/11×7+2×3/11 6、5/11×1/20+3/11×1/2+5/11×1/5 7、229又1/11除46又1/44
小学奥数举一反三六年级B版第四周的简便运算(3)的提高卷7道题1、4/33×133 2、 2000/2001×2002 3、13又1/5 ×5/6+28又2/7×7/9 4、4/13×2+1/13×6+2/13×6 5、1/11×6+3/11×7+2×3/11 6、5/11×1/20+3/11×1/2+5/11×1/5 7、
4/33×133
=4/33×(132+1)
=4/33×132+4/33
=16又4/33
2000/2001×2002
=2000/2001×(2001+1)
=2000+2000/2001
=2000又2000/2001
13又1/5 ×5/6+28又2/7×7/9
=(12+1又1/5 )×5/6+(27+1又2/7)×7/9
=10+1+21+1
=33
4/13×2+1/13×6+2/13×6
=1/13×8+1/13×6+1/13×12
=1/13×(8+6+12)
=1/13×26
=2
1/11×6+3/11×7+2×3/11
=3/11×2+3/11×7+2×3/11
=3/11×(2+7+2)
=3/11×11
=3
5/11×1/20+3/11×1/2+5/11×1/5
=5/11×1/20+3/11×1/2+5/11×1/5
=1/11×1/4+1/11×3/2+1/11×1
=1/11×(1/4+3/2+1)
=1/11×11/4
=1/4
229又1/11÷46又1/44
=(230×10)/11 × 44/(45×45)
= 368/81
注:229×11+1=230×10、46×44+1=45×45
1、4/33×133
=4/33(100+33)
=400/33+4
=532/33
2、2000/2001×2002
=2000/2001(2001+1)
=2000+2000/2001
=2000又2001分之2000
3、13又1/5 ×5/6+28又2/7×7/9
=(12+7/5)*5/6+(27+9/7)*...
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1、4/33×133
=4/33(100+33)
=400/33+4
=532/33
2、2000/2001×2002
=2000/2001(2001+1)
=2000+2000/2001
=2000又2001分之2000
3、13又1/5 ×5/6+28又2/7×7/9
=(12+7/5)*5/6+(27+9/7)*7/9
=10+7/6+21+1
=33又6分之1
4、4/13×2+1/13×6+2/13×6
=2/13*(4+3+6)
=2/13*13
=2
5、1/11×6+3/11×7+2×3/11
=3/11*(2+7+2)
=3/11*11
=3
6、5/11×1/20+3/11×1/2+5/11×1/5
=1/11*(1/4+3/2+1)
=1/11*11/4
=1/4
7、229又1/11除以46又1/44
=230÷46又1/44+1/11÷46又1/44
=230÷(46+1/44)+1/11÷(46+1/44)
=5+230/44+1/11*46+4
=9+115/22+1/22*23
=9+(115*23+1)/(22*23)
=9+2646/(22*23)
=9+1323/253
=3600/253
=
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