20+口X5先算加法在算乘法得到结果足610这道题的正确的数是几三年级数学？ 兵兵在计算12十囗x5时先算加法后算乘法得到的结果是610这...
\u5175\u5175\u5728\u8ba1\u7b9712\u5341\u53e3X5\u65f6\uff0c\u5148\u7b97\u52a0\u6cd5\uff0c\u540e\u7b97\u4e58\u6cd5\uff0c\u5f97\u5230\u7684\u7ed3\u679c610\u3002\u8fd9\u4e00\u9053\u9898\u7684\u6b63\u786e\u5f97\u6570\u662f\u4ec0\u4e48\uff1f\u8ba1\u7b97\uff1a
12+\u53e3X5=610
\u53e3=610\u00f75-12
\u53e3=122-12
\u53e3=110
\u6b63\u786e\u5f97\u6570\u662f\uff1a
12+110X5
=12+550
=562
\u7b54\uff1a\u6b63\u786e\u5f97\u6570\u662f562\u3002
\u5047\u8bbe\uff0c\u62ec\u53f7\u5185\u6570\u5b57\u4e3ax.\u5219\u539f\u8ba1\u7b97\u4e3a40+5x\u9519\u8bef\u8ba1\u7b97\u4e3a\uff0840+x\uff09x5=400\u6240\u4ee5\uff0cx=40\u8be5\u8ba1\u7b97\u6b63\u786e\u5f97\u6570\u5e94\u4e3a40+40x5=240
解:分析如果先算加法再算乘法，可理解为:（20+口）×5=610
那么（20+口）=610÷5
=122
口=122－20
=102
20+102×5
=20+510
=530
答:正确答案是530.
20+□*5＝610，用610-20=590，即□*5＝590，□就等于590/5=118，所以正确的数为118
绛旓細瑙:鍒嗘瀽濡傛灉鍏堢畻鍔犳硶鍐嶇畻涔樻硶锛屽彲鐞嗚В涓:锛20+鍙ｏ級脳5=610 閭ｄ箞锛20+鍙ｏ級=610梅5 =122 鍙=122锛20 =102 20+102脳5 =20+510 =530 绛:姝ｇ‘绛旀鏄530.
绛旓細20+60x5=320 灏忛┈铏庡湪璁＄畻20+鈻∶5鏃,鍏堢畻鍔犳硶鍐绠椾箻娉寰楀埌鐨勭粨鏋滄槸鍥涚櫨姝ｇ‘鐨勭粨鏋滄槸320銆
绛旓細鎮ㄥソ锛400梅5=80 80-20=60 姝ｇ‘鐨勬槸 20+60x5=20+300=320 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛屽鏋滄弧鎰忚鐐瑰嚮鍙充笅瑙掆滈噰绾充负婊℃剰鍥炵瓟鈥濆鏋滄湁鍏朵粬闂璇烽噰绾虫湰棰樺悗锛屽彟澶栧彂骞剁偣鍑绘垜鐨勫ご鍍忓悜鎴戞眰鍔╋紝绛旈涓嶆槗锛岃璋呰В锛岃阿璋侽(鈭鈭)O锛岃寰楅噰绾筹紝浜掔浉甯姪 绁濆涔犺繘姝ワ紒
绛旓細80-20=60 姝ｇ‘鐨勬槸 20+60x5=20+300=320 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶,鍙﹀鍙戝苟鐐瑰嚮鎴戠殑澶村儚鍚戞垜姹傚姪,璇疯皡瑙,
绛旓細閭ｆ嫭鍙烽噷闈㈢殑鏁板瓧搴旇鏄細80 20+80脳5=500
绛旓細姝ｇ‘寰楁暟锛500-(20x4)=420
绛旓細500梅5-20=80 20+80x5=420 鏈鍚庣殑寰楁暟涓420 濂介毦...
绛旓細(500-20X5 )梅5=80 鍗虫嫭鍙烽噷鏄80 20+80x5=420
绛旓細(40+120)*5 =800 40 + 120*5=40 + 600 =640
绛旓細300梅5-24 鍙=60-24 鍙=36 姝ｇ‘鐨勭粨鏋滀负锛24+36x5 =24+180 =204
