47/37×25-25/37×10 7.5×102
47/37×25-25/37×107.5×1029.9+99.9+999.9+0.32009/2010×2009+2009/2010(简便运算)...
47/37×25-25/37×10 7.5×102 9.9+99.9+999.9+0.3 2009/2010×2009+2009/2010 (简便运算)
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47/37×25-25/37×10
=25/37×47-25/37×10
=25/37×(47-10)
=25/37×37
=25
7.5×102
=7.5×(100+2)
=7.5×100+7.5×2
=750+15
=765
9.9+99.9+999.9+0.3
=10+100+1000
=1110
2009/2010×2009+2009/2010
=2009/2010×(2009+1)
=2009/2010×22010
=2009
=25/37×47-25/37×10
=25/37×(47-10)
=25/37×37
=25
7.5×102
=7.5×(100+2)
=7.5×100+7.5×2
=750+15
=765
9.9+99.9+999.9+0.3
=10+100+1000
=1110
2009/2010×2009+2009/2010
=2009/2010×(2009+1)
=2009/2010×22010
=2009
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