×12=×=
94×56.87+94×43.48+6×100.35.
计算(能简算的要简算) 12.5×8×4×0.25.
9999×7+1111×37.
(1)26.86×25.66﹣16.86×25.66(2)52.3×0.68+3.2×5.23 (3)(4)99+99×99+99×99×99.
4.7×99+4.7.