(m+n)-(______)=2m-p.

(m+n)-(______)=2m-p.


根據題意可得:所填的式子為(m+n)-(2m-p),化簡為(m+n)-(2m-p)=m+n-2m+p=-m+n+p.



(30又3分之2)×(29又3分之1)


原式=(30+2/3)×(30-2/3)
=30²;-(2/3)²;
=900-4/9
=899又5/9