11+12+13+14+.49+50+49+.7+6+5等于
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/11 11:14:29
![11+12+13+14+.49+50+49+.7+6+5等于](/uploads/image/z/305560-64-0.jpg?t=11%2B12%2B13%2B14%2B.49%2B50%2B49%2B.7%2B6%2B5%E7%AD%89%E4%BA%8E)
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11+12+13+14+.49+50+49+.7+6+5等于
11+12+13+14+.49+50+49+.7+6+5等于
11+12+13+14+.49+50+49+.7+6+5等于
(60*19+25)*2+10+9+8+7+6+5=2375
原式=(11+49)+(12+48)+……+(29+31)+30+(50+5)+(49+6)+……+(28+27)
=60*19+3+55*23
=2435