问题
解答题
下面各题怎样算简便就怎样算.
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答案
解(1)2000-586-114
=2000-(586+114)
=2000-700
=1300
(2)55×25+25×45
=25×(55+45)
=25×100
=2500
(3)(25+125)×8
=25×8+125×8
=200+1000
=1200
(4)198×47
=(200-2)×47
=200×47-2×47
=9400-94
=9306
(5)540÷12÷5
=540÷(12×5)
=540÷60
=9
(6)77×13-13×27
=13×(77-27)
=13×50
=650
(7)104×32
=(100+4)×32
=100×32+4×32
=3200+128
=3328
(8)99×79+79
=79×(99+1)
=79×100
=7900