如题所述
第1个回答 2016-01-15
追答
亲,希望对你有帮助,望采纳!关注我,你
有不明白的地方可以继续追问!谢谢!
第2个回答 2016-01-15
49*99+99
=99x(49+1)
=99x50
=(100-1)x50
=5000-50
=4950
14*99+14
=14x(99+1)
=14x100
=1400
=99x(49+1)
=99x50
=(100-1)x50
=5000-50
=4950
14*99+14
=14x(99+1)
=14x100
=1400
第3个回答 2016-01-15
99×(49+1)=4950
14×(99+1)=1400
14×(99+1)=1400
第4个回答 2016-01-15
49*99+99
=49*99+1*99
=49*(99+1)
=49*100
=4900
.....
14*99+14
=14*99+14*1
=14*(99+1)
=14*100
=1400追答
=49*99+1*99
=49*(99+1)
=49*100
=4900
.....
14*99+14
=14*99+14*1
=14*(99+1)
=14*100
=1400追答
满意,请采纳。不懂可追问。我很详细哦
第5个回答 2016-01-15
99*(49+1)=4950追答
14*(99+1)=1400