比8的5倍多20的数是多少?
80\u6bd4\u4e00\u4e2a\u6570\u76845\u500d\u591a20\uff0c\u8fd9\u4e2a\u6570\u662f\u591a\u5c11\u7406\u6e05\u5173\u7cfb\uff0c\u9898\u76ee\u7684\u610f\u601d\u7ffb\u8bd1\u4e00\u4e0b\u5c31\u662f\uff0c\u4e00\u4e2a\u6570\u4e58\u4ee55+20=80
\u6240\u4ee5\u8bf4\uff0c\u8fd9\u4e2a\u6570=\uff0880-20\uff09\u9664\u4ee55=12
\u8fd9\u4e2a\u6570\u5c31\u662f12.
5x+8
605X8=40 40+20=60
20
60
60
60
绛旓細8脳5+7 =40+7 =47
绛旓細8x5+360=40+360=400
绛旓細X*8-X*5=24 X=8 璁捐繖涓鏁颁负X 浠栫殑8鍊嶄篃灏辨槸8X 姣斾粬鐨5鍊5X澶24 閭d箞8X-5X=24 閭=8 甯屾湜鑳藉府鍒颁綘 璋㈣阿锛佷篃鍙互鐢ㄤ粬浜屽勾绾х殑鏂瑰紡璺熶粬璁 鍥犱负杩欎釜鏁8鍊嶆瘮浠栫殑5鍊嶅ぇ3鍊 鎵浠ュ鍑烘潵鐨24骞冲垎鎴3浠藉緱鍒扮殑灏辨槸杩欎釜鏁 鎵浠ユ槸24闄や互3绛変簬8 绠楀紡锛24/锛8-5锛=8 ...
绛旓細璁撅細杩欎釜鏁版槸x 8x-5x =17.1 3x=17.1 X =5.7
绛旓細鍋囪杩欎釜鏁颁负x锛屽垯8x+8=5x+20锛3x=12锛寈=4锛岃繖涓鏁版槸4銆
绛旓細鍥炵瓟锛8X-4X绛変簬20 X绛変簬5
绛旓細72梅锛8-5锛=72梅3 =24
绛旓細濂崇敓浜烘暟鏄敺鐢熺殑6鍊,濂崇敓浜烘暟姣旂敺鐢澶20浜猴紝鍥犳鐢风敓鏄4浜猴紝濂崇敓鏄24浜猴紱杩欐槸鐢ㄥ埌璇存槑娉曠殑锛岃鏄庯細濂崇敓鏄敺鐢熺殑鍏嶏紝濂崇敓浜烘暟姣旂敺鐢熷20浜恒備篃灏辨槸璇寸敺鐢鐨勪簲鍊嶆槸20浜猴紝鍏噺涓绛変簲锛20梅5绛夊洓锛屾墍浠ョ敺鐢熸槸鍥涗汉锛屽コ鐢24浜恒
绛旓細1.8X=5X+24 X=8 2.6X+2.5x4=25 X=2.5
绛旓細瑙o細璁捐繖涓鏁颁负X锛岀敱棰樺彲寰楋細8X=3X+20 5X=20 X=4 绛旓細杩欎釜鏁版槸32