数字趣味难题20道 ~~~~~~~~~~~~``3
AABB=CC
字母AABB换成数字,添上运算符号,得CC。共有多少答案?
參考答案:不使用数字0的话,共有177个算式:
11+22=33,(1+1)*22=44,11*(2+2)=44,11*2*2=44,11+33=44,(1+1)*33=66,11*(3+3)=66
11*3*3=99,11+44=55,(1+1)*44=88,11*(4+4)=88,11+55=66,1*16+6=22,1*(16+6)=22
11+66=77,11+77=88,1+1+8*8=66,11+88=99,22+11=33,(2+2)*11=44,2*2*11=44
2*(21+1)=44,22*(1+1)=44,2+2*3+3=11,22+33=55,22+44=66,2/2+5+5=11,22+55=77
22+66=88,2*(2+7)-7=11,22+77=99,2+2*9-9=11,33-11=22,33+11=44,(3+3)*11=66
33*(1+1)=66,3*3*11=99,33-22=11,3+3*2+2=11,33+22=55,3+3*4-4=11,3+3+4*4=22
33+44=77,3/3+5+5=11,33+55=88,33+66=99,3+3+7*7=55,3+3+8+8=22,44/(1+1)=22
44-11=33,44+11=55,(4+4)*11=88,44*(1+1)=88,44/(2+2)=11,44/2/2=11,44+22=66
4+42*2=88,44-33=11,4*4+3+3=22,44+33=77,4/4+5+5=11,4+4+5*5=33,44+55=99
4+4*6-6=22,4+4+7+7=22,4*(4+9+9)=88,55-11=44,55+11=66,5+5+2/2=11,5+(5-2)*2=11
55-22=33,5*(5+2)-2=33,55+22=77,5+5+3/3=11,5+(5-3)*3=11,55-33=22,(5*5-3)*3=66
55+33=88,55-44=11,5+5+4/4=11,5*5+4+4=33,55+44=99,5+5+6/6=11,5-(5-6)*6=11
5+5+6+6=22,5+5+7/7=11,5*5-7-7=11,5+5*7-7=33,5+5+8/8=11,5+5+9/9=11,66/(1+1)=33
66-11=55,66+11=77,6+6-2/2=11,6+6/2+2=11,66-22=44,66+22=88,66/(3+3)=11
6+6-3/3=11,6+6/3+3=11,(6*6-3)/3=11,66+33=99,(6*6-3)*3=99,6+6-4/4=11,66-44=22
6+64/4=22,6*(6/4+4)=33,66-55=11,6+(6-5)*5=11,6+6-5/5=11,6*(6-5)+5=11,6*6-5*5=11
6/6+5+5=11,6/(6-5)+5=11,6+6+5+5=22,6+6-7/7=11,6*6-7-7=22,6+6*7+7=55,6+6-8/8=11
6-(6-8)*8=22,6+6-9/9=11,6-(6-9)*9=33,7*(7+1)-1=55,77-11=66,77+11=88,7*(7-2)-2=33
77-22=55,77+22=99,77-33=44,7*7+3+3=55,7+7+4+4=22,77-44=33,7*7-4*4=33
7/7+5+5=11,77-55=22,7+75/5=22,77-66=11,7+7*6+6=55,7*7-8-8=33,7+7*8-8=55
88/(1+1)=44,8*(8-1)-1=55,8*8+1+1=66,88-11=77,88+11=99,8+(8-2)/2=11,(8*8+2)/2=33
88-22=66,8+8+3+3=22,88-33=55,8*8-3*3=55,88/(4+4)=11,8+(8+4)/4=11,8/8+5+5=11
88-55=33,8*(8+5)-5=99,88-66=22,8*(8-6)+6=22,88-77=11,99-11=88,(9+9)/2+2=11
9+92/2=55,99-22=77,9*9-2-2=77,9*9-2*2=77,99/3/3=11,9+(9-3)/3=11,99-33=66
99-44=55,(9+9+4)*4=88,9/9+5+5=11,99-55=44,99-66=33,9*(9-6)+6=33,9*(9-7)-7=11
99-77=22,99-88=11