873×6=708×6=138×4=840×9=
快速计算.×3= ×12= ×6= 3×= 4×=20×= 4×= 3×= 100×= 50×=×33= 24×= 35×= 10×= 12×=7×= 200= 0×= ×36= ×15=4×= 26×= 4×1= ×= ×=×=
口算,直接写出结果.(1)×= (2) ÷6= (3)×3= (4)×4= (5)×=(6)×= (7)3×6= (8) = (9)6×= (10) =8.
×4= .
+++= × = = × = .
直接写得数.×40= = == = 18×8×= ×0×= =