0.9(X-4)=19.8
x-4=22;
x=26;
计算'49.5乘以10又5分之3-(50-2分之1)乘以5分之3
=49.5×(10+3/5)-49.5×(3/5)
=49.5×(10+3/5-3/5)
=49.5×10
=495;
如果本题有什么不明白可以追问,
0.9(X-4)=19.8
x-4=22;
x=26;
计算'49.5乘以10又5分之3-(50-2分之1)乘以5分之3
=49.5×(10+3/5)-49.5×(3/5)
=49.5×(10+3/5-3/5)
=49.5×10
=495;
如果本题有什么不明白可以追问,