16.3-3.57+2.7-4.43 44×25 99×26+26 540÷[(460-70)÷13]
0.23+3.7=
2.56-1.5=
1-0.45=
0.9+0.99=
25×40=
1.7×100=
125×5×8=
24×4÷24×4=