19=1x9+(1+9) 29=2x9+(2+9) 39=3x9+(3+9) 1289=?
19=1x9+(1+9) 29=2x9+(2+9) 39=3x9+(3+9) 1289=?
1x9+2=11,12x9+3=111,123x9+4=1111,求12345X9+6=?,1234567X9+?=11
1x9+2=11 12x9+3=111 123x9+4=1111类似这种题有哪些
9+9x9= ( )+( )x9=900000 18+98x9= ( )+( )x9=9000000 117+987x9
1十0x9=1,2+1x9=11,3+12x9=111,4十123x9=1111,5十1234x9=11111,6十12
1.19=1X9+(1+9)
3.228x(-9)+(-3.272)x9-(-1.5)x9=
19+9 X9=100 118+98X9=1000 117+987X9=10000 116+987
2/1x3+2/3X5+2/5x7=2/7x9+2/9x11
0X9+8=8 9X9+7=88 98X9+6=888 987X9+5=8888照这样继续写出几道题试试
1x8+1 =9 12x8+2=98 123x8+3=987 9x9-1=80 98x9-2=880 987x8-3=8
1/1x3+1/3x5+1/5x7+1/7x9+1/9x11=?