口算。

2×2=        6×5=        0×9=        7×3=

4×9=        8×5=        9×7=        8×2=

3×6=        1×7=        3×4=        4×7=

3×5=        9×9=        7×2=         5×9=

2×4=        3×8=        6×4=         4×4=

9×6=        5×7=        8×4=         6×6=

9×2=        2×6=        6×7=         7×7=

6×8=        7×9=        5×6=         8×8=

3×9=        8×7=        5×9=        3×5-2=

4×3+7=         5×4+5=         4×4-3=

5×1+9=         2×5+8=        3×2+5=         6+6+6=