一根绳子长100米,第一次用去46米,第二次用去18米,绳子比原来短了多少米?还剩多少米? (1.)一根绳子长100米,第一次用去39米,第二次用去25...
\u4e00\u6839\u7ef3\u5b50\u957f100\u7c73,\u7b2c\u4e00\u6b21\u7528\u53bb38\u7c73,\u7b2c\u4e8c\u6b21\u7528\u53bb22\u7c73,\u73b0\u5728\u7ef3\u5b50\u7684\u957f\u5ea6\u6bd4\u539f\u6765\u77ed\u4e86\u591a\u5c11\u7c73?\u201c\u6b63\u786e\u7684\u7b54\u7528\u53bb\u4e86\u591a\u5c11\u5c31\u77ed\u4e86\u591a\u5c11\uff0c\u6240\u4ee5\u752838 22=60\u7c73
\u95ee\u7684\u662f\u77ed\u4e86\u591a\u5c11\uff0c\u53ea\u9700\u8981\u628a\u51cf\u53bb\u7684\u52a0\u4e0a\u5c31\u662f\u6240\u6c42\u7684\u7b97\u5f0f
\uff081.\uff09\u4e00\u6839\u7ef3\u5b50\u957f100\u7c73\uff0c\u7b2c\u4e00\u6b21\u7528\u53bb39\u7c73\uff0c\u7b2c\u4e8c\u6b21\u7528\u53bb25\u7c73\u3002\u73b0\u5728\u7ef3\u5b50\u7684\u957f\u5ea6\u6bd4\u539f\u6765\u77ed\u4e86\u591a\u5c11\u7c73\uff1f\u7b97\u5f0f\u662f\uff08D\uff09\u3002
A\uff1a100-39-25 C\uff1a100-\uff0839+25\uff09 B\uff1a100-39+25 \u2018D\uff1a39+25
\uff082.\uff09\uff08B\uff09\u9664\u4ee59\u6ca1\u6709\u4f59\u6570\u3002A.52 B.63
C.64 D.38 \u8c22\u8c01\u6765\u5e2e\u5e2e\u6211\uff01
\u56e0\u4e3a63\u00f79=7\uff0c\u6ca1\u6709\u4f59\u6570
\u6240\u4ee5\u9009B
100-64=36米
答:绳子比原来短了64米。还剩36米。
64
36
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