19.8x25+12.5x24+10.2x25的简便方法
答案:3 悬赏:60 手机版
解决时间 2021-03-23 02:39
- 提问者网友:聂風
- 2021-03-22 16:43
19.8x25+12.5x24+10.2x25的简便方法
最佳答案
- 五星知识达人网友:话散在刀尖上
- 2021-03-22 18:19
19.8x25+12.5x24+10.2x25
=(19.8+10.2)×25+12.5×24
=30×25+12.5×24
=30×25+25×0.5×24
=30×25+25×12
=(30+12)×25
=42×25
=(10×4+2)×25
=10×4×25+2×25
=10×100+50
=1000+50
=1050
=(19.8+10.2)×25+12.5×24
=30×25+12.5×24
=30×25+25×0.5×24
=30×25+25×12
=(30+12)×25
=42×25
=(10×4+2)×25
=10×4×25+2×25
=10×100+50
=1000+50
=1050
全部回答
- 1楼网友:平生事
- 2021-03-22 20:13
第一项和第三项合并加上第二项
25*(19.8+10.2)+12.5*24=1050
25*(19.8+10.2)+12.5*24=1050
- 2楼网友:孤独的牧羊人
- 2021-03-22 19:08
=25x(19.8+12+10.2)
=25x42
=50x21
=1050
=25x42
=50x21
=1050
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