48x2548x25的巧算
解：采用拆分法和结合律，
原式=4x12x25
=12x100
=1200
原式=4x12x25
=12x100
=1200
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第1个回答 2017-07-03
48x(2500+48)x25
48x2500x25+48x48x25
3x4x2500x4x25+48x12x4x25
3x10000x100+576x100
3000000+57600
3057600
48x2500x25+48x48x25
3x4x2500x4x25+48x12x4x25
3x10000x100+576x100
3000000+57600
3057600
第2个回答 2017-07-03
48×25+48×25
=12×4×25+12×4×25
=12×(4×25)+12×(4×25)
=12×100+12×100
=1200+1200
=2400
=12×4×25+12×4×25
=12×(4×25)+12×(4×25)
=12×100+12×100
=1200+1200
=2400
第3个回答 2017-07-03
48x2548x25
=12x4x25x2548
=12x100x2548
=1200x2548
=1000x2548+200x2548
=2548000+509600
=3057600
=12x4x25x2548
=12x100x2548
=1200x2548
=1000x2548+200x2548
=2548000+509600
=3057600
第4个回答 2017-07-03
48×25
=12×4×25
=12×(4×25)
=12×100
=1200
=12×4×25
=12×(4×25)
=12×100
=1200
