对于两个数a和b;定义一种新运算“a*b=2a+b÷a”,则(2*4)*12=
因为,2*4=2×2+4÷2,=4+2,
=6,
所以(2*4)*12,
=6*12,
=2×6+12÷6,
=12+2,
=14;
故答案为:14.
绛旓細=12+2锛=14锛涙晠绛旀涓猴細14锛
绛旓細2鈻筹紙3鈻4锛=2鈻筹紙2脳3+4脳3锛=2鈻18=3脳2+2脳18=6+36=42鏁呯瓟妗堜负锛42锛
绛旓細鍥犳锛(1020)-|||-30 鐨勭粨鏋滄槸 1110銆
绛旓細琚瀹氫箟鎴愪簡鏂拌繍绠,鎴戜滑鐢 | 鏇夸唬鍘熸潵鐨 锛2*4锛*12 =(2|2+4)*12 =8*12 =2|8+12 =16+12 =28 x*10=84 ==> 2|x+10=84 ==> 2|x=84-10=74 ==> x=74/2=37
绛旓細鏍规嵁瀹氫箟锛宎*b=2a+bxa 鍥犳锛(2*4)*12=(2脳4)+(12脳2)璁$畻 (2脳4) 寰楀埌 8锛岃绠 (12脳2) 寰楀埌 24 鍥犳锛(2*4)*12=8+24=32 鍥犳锛岀瓟妗堜负 32銆
绛旓細锛2*4锛*12=(2脳2+4脳2)*12=12*12=12脳2+12脳12=24+144=168 x*10=2x+10x=84 鏁 12x=84 x=7
绛旓細A鈼B=6A+B 鏍规嵁瀹氫箟閫愭璁$畻鍒欏彲 (5鈼3)鈼2 =(6脳5+3)鈼2 =33鈼2 =6脳33+2 =198+2 =200
绛旓細a#b=2a+b+a 2#4=2*2+4+2=10 锛2#4锛#12=10#12=2*10+12+10=42
绛旓細4*5=3脳4-2脳5=2
绛旓細锛2#4锛#12 =[(2*2+4)/2]#12 =4#12 =(2*4+12)/4 =5