直接写得数。529+198= 992= 305﹣199= 2.05×4= 8×12.5%=0.28÷0.7= +×0= = 0.68++0.32= ÷+0.75×8=
12.06+5.07+2.9430.34+9.76-10.34
1.3×11.6-1.6×1.3 1--
(48×75×81)÷(24×25×27) 7.5×2.3+1.9×2.5 5-(-) 19.68-(2.97+9.68)
34×3535-35×3434 27000÷125 345345÷15015 347+358+352+349
67×21+18×21+85×79 321×81+321×19