9个8相加的和是多少怎么用3种方法写出来 8个9相加的和是多少？
9\u548c8\u76f8\u52a0\u3001\u548c\u662f\u591a\u5c11\u89e3\uff1a9\u548c8\u76f8\u52a0\u548c\u662f\uff08 17 \uff09
\u2235\u5df2\u77e5\u9700\u6c42\u51fa9\u548c8\u76f8\u52a0\u548c\u662f\u591a\u5c11
A + B = C
\u22349 + 8
= \uff0810 - 1\uff09+ \uff0810 - 2\uff09
= 10 - 1 + 10 - 2
= \uff0810 + 10\uff09+ \uff08- 1 - 2\uff09
= 20 - 3
= 17
\u7b54\uff1a9\u548c8\u76f8\u52a0\u548c\u662f17
9\u00d78=72\uff0c
\u7b54\uff1a8\u4e2a9\u76f8\u52a0\u7684\u548c\u662f72\uff0e
2、或9×8=72.
3、8+8+8+8+8+8+8+8+8=72.
9个8相加的和是72
3种方法如下
8+8+8+8+8+8+8+8+8＝72
8×9＝72
9×8＝72
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绛旓細24绉嶉夋硶銆1+9=10銆1+8=9銆2+9=11銆2+8=10銆2+7=9銆3+9=11銆3+8=銆3+7=10銆3+6=9銆4+9=13銆4+8=12銆4+7=11銆4+6=10銆4+5=9銆5+9=14銆5+8=13銆5+7=12銆5+6=11銆6+9=15銆6+8=14銆6+7=13銆7+9=16銆7+8=15銆8+9=17銆
