98x42 25x24 104x25 78x101-78 99x99+99 39x(200+1)简便计算
答案:2 悬赏:60
解决时间 2021-01-19 08:30
- 提问者网友:浩歌待明月
- 2021-01-18 20:27
98x42 25x24 104x25 78x101-78 99x99+99 39x(200+1)简便计算
最佳答案
- 二级知识专家网友:上分大魔王
- 2021-01-18 21:49
98x42
=100x42-2x42
=4200-84
=4116
25x24
=25x4x6
=600
104x25
=100x25+4x25
=2500+100
=2600
78x101-78
=78x(101-1)
=78x100
=7800
99x99+99
=99x(99+1)
=99x100
=9900
39x(200+1)
=39x200+39x1
=7800+39
=7839
=100x42-2x42
=4200-84
=4116
25x24
=25x4x6
=600
104x25
=100x25+4x25
=2500+100
=2600
78x101-78
=78x(101-1)
=78x100
=7800
99x99+99
=99x(99+1)
=99x100
=9900
39x(200+1)
=39x200+39x1
=7800+39
=7839
全部回答
- 1楼网友:末日狂欢
- 2021-01-18 23:25
98*42=(100-2)*42
=100*42-42*2
=4200-84=4116
25*24=25*4*6=100*6=600
104*25=(100+4)*25=100*25+4*25=2500+100=2600
78*101-78
=78*(101-1)=78*100=7800
99*99+99
=99*(99+1)=99*100=9900
39*(200+1)
=7800+39=7839
=100*42-42*2
=4200-84=4116
25*24=25*4*6=100*6=600
104*25=(100+4)*25=100*25+4*25=2500+100=2600
78*101-78
=78*(101-1)=78*100=7800
99*99+99
=99*(99+1)=99*100=9900
39*(200+1)
=7800+39=7839
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