巧算；78x72等于多少。立算式 巧算38x72+38x27
\u5de7\u7b97\u7b97\u5f0f25X72\u00f75\u00f73
\u5982\u56fe
38X(72+27+1)-38X1
=3800-38
=3762
7*（7+1）=56是前两位
所以为5616
2×8=16
7×（7+1）=56
78×72=5616
78x72
=(80-2)(70+2)
=5600+160-140-4
=5616
7x8x100+8x2=5616
绛旓細鎵浠ヤ负5616
绛旓細78x72= 5616 86x84=7224 55x55=3025 87x27=2349 75x35=2625 430x47=20210 0.56x5.4=3.024 绛夌瓑
绛旓細0.78x23+7.8x7.7鎬庝箞宸х畻? 0.78x23+7.8x7.7 =0.78x23+[7.8梅10]x[7.7x10] =0.78x23+0.78x77 =0.78x[23+77] =0.78x100 =78 宸х畻888x7+111x44+777x29 =111脳8脳7+111脳44+111脳7脳29 =111脳56+111脳44+111脳203 =111脳锛56+44+203锛 =111...
绛旓細64*36+128*15绠渚胯绠64*36+128*15绠渚胯绠=64x=64x66=64x60+64x6=3840+384=3840+400-16=4240-16=422415脳銆120-銆戠畝渚挎柟娉曠畝渚挎柟娉曪細15脳銆120-銆=15x=15x42=15x=15x40+15x2=600+30=63015脳梅24绠渚胯繍绠15脳梅24=15x72梅24=15x3=4536x15绛変簬澶氬皯鍏蜂綋鍥炵瓟濡備笅锛36脳15=36脳10+36脳...
绛旓細=4脳8脳125脳25 =锛4脳25锛壝楋紙8脳125锛=100脳1000 =100000 鏂规硶鍏細宸鍙橀櫎涓轰箻 闄や互涓涓暟绛変簬涔樹互杩欎釜鏁扮殑鍊掓暟 鏂规硶涓冿細瑁傞」娉 鍒嗘暟瑁傞」鏄寚灏嗗垎鏁扮畻寮忎腑鐨勯」杩涜鎷嗗垎锛屼娇鎷嗗垎鍚庣殑椤瑰彲鍓嶅悗鎶垫秷锛岃繖绉嶆媶椤硅绠楃О涓鸿椤规硶.甯歌鐨勮椤规柟娉曟槸灏嗘暟瀛楀垎鎷嗘垚涓や釜鎴栧涓暟瀛楀崟浣嶇殑鍜屾垨宸
绛旓細鍙互搴旂敤鍔犲噺涔橀櫎鐨勫垎閰嶅緥鍜岀粨鍚堝緥鏉ョ畝绠椼34脳28+68脳70+34脳72+68脳30 =34x28+34x2x70+34x72+34x30x2 =34x(28+72+140+60)=34x300 =10200
绛旓細8*2=16鏄湯灏句袱浣 7*锛7+1锛=56鏄墠涓や綅 鎵浠ヤ负5616
绛旓細8*2=16鏄湯灏句袱浣 7*锛7+1锛=56鏄墠涓や綅 鎵浠ヤ负5616
绛旓細浣犲ソ锛屾湰棰樺凡瑙ｇ瓟,濡傛灉婊℃剰璇风偣鍙充笅瑙掆滈噰绾崇瓟妗堚濄36+13脳15-72鐨勭畝渚挎柟娉曞師寮=x15-=10x15+3x15-36=150+45-36=150+9=159渚涘弬鑰冦64*36+128*15绠渚胯绠64*36+128*15绠渚胯绠=64x=64x66=64x60+64x6=3840+384=3840+400-16=4240-16=422415脳銆120-銆戠畝渚挎柟娉曠畝渚挎柟娉曪細15脳銆120-銆=...
绛旓細9999*8+3333*6+2222*5 锛1111x72+1111x18+1111x10 =1111x(72+18+10)=1111x100 =111100
