0.8x33x1.257.2x9.9
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0.8x33x1.257.2x9.90.8x33x1.257.2x9.90.8x33x1.257.2x9.90.8x33x1.25=4/5×5/4×33=1×33=337.2x9.9=7.2×(10-
0.8x33x1.257.2x9.9
0.8x33x1.25
7.2x9.9
0.8x33x1.257.2x9.9
0.8x33x1.25
=4/5×5/4×33
=1×33
=33
7.2x9.9
=7.2×(10-0.1)
=7.2×10-7.2×0.1
=72-0.72
=71.28
0.8x33x1.25
=33x(0.8x1.25)
=33x1
=33
7.2x9.9
=7.2x(10-0.1)
=7.2x10-7.2x0.1
=72-0.72
=71.28
0.8*33*1.25=0.8*1.25*33=1*33=33
7.2*9.9=7.2*(10-0.1)=7.2*10-7.2*0.1=72-0.72=71.28
0.8*33*1.25=1*33=33
7.2*9.9=7.2*(10-0.1)=72-0.72=71.28
0.8x33x1.257.2x9.9
9x9
3.228x(-9)+(-3.272)x9-(-1.5)x9
2.34x9.9+0.234
9+9x9= ( )+( )x9=900000 18+98x9= ( )+( )x9=9000000 117+987x9= ( )+( )x9=90000000找规律
19+9 X9=100 118+98X9=1000 117+987X9=10000 116+98719+9 X9=100118+98X9=1000117+987X9=10000116+9873X9=100000有什么规律在写两组
19=1x9+(1+9) 29=2x9+(2+9) 39=3x9+(3+9) 1289=?
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