作业帮79乘25加25怎么简便 快加油63乘8加91乘63加63怎么简便1999加999乘999怎么简便360乘26加260乘64怎么简便
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 17:46:07
79乘25加25怎么简便 快加油63乘8加91乘63加63怎么简便1999加999乘999怎么简便360乘26加260乘64怎么简便
79乘25加25怎么简便 快
加油
63乘8加91乘63加63怎么简便
1999加999乘999怎么简便360乘26加260乘64怎么简便
79乘25加25怎么简便 快加油63乘8加91乘63加63怎么简便1999加999乘999怎么简便360乘26加260乘64怎么简便
=(79+1)×25
=80×25
=2000
79×25+25
=79×（25+25）
=79×50
=自己算吧
79乘25加25
=79x25+25
=25x(79+1)
=25x80
=2000
希望对你有帮助
79×25+25
=(79+1)×25
=80×25
=2000
①=(79+1)×25
=80×25
=2000
②=63×(8+91+1)
=63×100
=6300③1999+（1000-1）*999=1999+999000-999=1000000
（79+1）*25=2000
提取公因式
79X25+25
=(79+1)X25
=80X25=2000
63x8+91x63+63
=63x(8+91+1)
=63x100=6300
1999+999x999
=1000+999+999x999
=1000+999x(999+1)
=1000+999000
=100...
全部展开
提取公因式
79X25+25
=(79+1)X25
=80X25=2000
63x8+91x63+63
=63x(8+91+1)
=63x100=6300
1999+999x999
=1000+999+999x999
=1000+999x(999+1)
=1000+999000
=1000000
360x26+260x64
=(100+260)x26+260x64
=100x26+260x26+260x64
=100x26+260x100
=286x100
=28600
收起