在式子里加上括号,使算式成立:
\u5728\u4e0b\u9762\u5f0f\u5b50\u91cc\u52a0\u4e0a\u62ec\u53f7\uff0c\u4f7f\u7b97\u5f0f\u6210\u7acb(7\u00d79+12)\u00f73-2=23 7\u00d79+12\u00f7(3-2)=75
(90-60)\u00f715+5\u00d79=47
90-(60\u00f715+5\u00d79)=41
\u3010\uff0890\u51cf60\uff09\u9664\u4ee515\u3011\u52a0\uff085\u4e589\uff09\u7b49\u4e8e47
1; 7脳9+12梅(3-2)=75 2; (7脳9+12)梅3脳2=23 3; 90-(60梅15+5脳9)=417×9+12÷(3-2)=75
(7×9+12)÷3-2=23
90-60÷15+5×9=41
90-60÷15+5×9=41(本来就是嘛)
7×9+12÷(3-2)=75
(7×9+12)÷3-2=23
90-60÷15+5×9=41
90-60÷15+5×9=41
绛旓細1; 7鑴9+12姊(3-2)=75 2; (7鑴9+12)姊3鑴2=23 3; 90-(60姊15+5鑴9)=41
绛旓細鍥犳5脳锛5-5梅5锛+5=25鎴愮珛銆
绛旓細鍦ㄨ繖涓紡瀛愪腑锛棣栧厛璁$畻鎷彿鍐呯殑鍑忔硶杩愮畻锛屽緱鍒 80 梅 4 = 20锛岀劧鍚庡啀灏嗙粨鏋滀箻浠 5 寰楀埌 100銆傝繖涓粨鏋滅瓑浜 4锛屽洜姝ょ瓑寮忔垚绔嬨
绛旓細48-(18梅6+8)=37
绛旓細64+24梅(8锛2脳3)=64+24梅(8锛6)=64+24梅2 =64+12 =76
绛旓細鍦鎷彿閲濉笂涓嶅悓鐨勬暟浣跨瓑寮忔垚绔嬶細9-锛7锛=锛7锛-5銆傚~鍚堥傜殑鏁板瓧浣跨畻寮忔垚绔嬪涓嬶細鍚湁绛夊彿鐨寮忓瓙鍙仛绛夊紡銆傜瓑寮忓彲鍒嗕负鐭涚浘绛夊紡鍜屾潯浠剁瓑寮忋傜瓑寮忎袱杈瑰悓鏃鍔犱笂锛堟垨鍑忓幓锛夊悓涓涓暣寮忥紝鎴栬呯瓑寮忎袱杈瑰悓鏃朵箻鎴栭櫎浠ュ悓涓涓笉涓0鐨勬暣寮忥紝鎴栨槸绛夊紡宸﹀彸涓よ竟鍚屾椂涔樻柟锛岀瓑寮忎粛鐒舵垚绔嬨傚舰寮忔槸鎶婄浉绛夌殑涓や釜鏁帮紙鎴...
绛旓細5脳(200-3脳12梅4)=5x(200-9)=191x5 =955
绛旓細1脳2脳3脳4-5脳6+7=1 1+2脳3-4+5-6+7-8=1
绛旓細3x(8+48梅(8-5))=72
绛旓細80脳30+20/60-50脳40+90鍔犱笂鎷彿浣缁撴灉鏈澶 80脳30+20/锛60-50锛壝楋紙40+90锛 =2400+2x130 =2660