四年级上册简便计算题简单 25x3x4 25x6x2 36x25 25x13x125x3
四年级上册简便计算题简单25x3x425x6x236x2525x13x125x32125x25x32102x7645x4x523x5x225x9X4...
四年级上册简便计算题简单
25x3x4 25x6x2 36x25 25x13x125x32 125x25x32 102x76 45x4x5 23x5x2 25x9X4 展开
25x3x4 25x6x2 36x25 25x13x125x32 125x25x32 102x76 45x4x5 23x5x2 25x9X4 展开
展开全部
先要知道；25x4＝100 125x8＝1000
25x3x4 ＝100x3＝300
25x6x2＝25x3x2x2＝25x3x4＝100x3＝300
36x25＝9x4x25＝9x100＝900
25x13x125x32＝13x25x125x8x4＝13x25x4x125x8＝13x100x1000＝1300000
125x25x32＝125x25x8x4＝125x8x25x4＝1000x100＝100000
102x76＝（100+2）x76＝100x76+2x76＝7600+152＝7752
45x4x5＝9x5x4x5＝9x25x4＝9x100＝900
23x5x2＝23x10＝230
25x9X4＝25x4x9＝100x9＝900
25x3x4 ＝100x3＝300
25x6x2＝25x3x2x2＝25x3x4＝100x3＝300
36x25＝9x4x25＝9x100＝900
25x13x125x32＝13x25x125x8x4＝13x25x4x125x8＝13x100x1000＝1300000
125x25x32＝125x25x8x4＝125x8x25x4＝1000x100＝100000
102x76＝（100+2）x76＝100x76+2x76＝7600+152＝7752
45x4x5＝9x5x4x5＝9x25x4＝9x100＝900
23x5x2＝23x10＝230
25x9X4＝25x4x9＝100x9＝900
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