× ×
×0 ×1
5× 5× × ×
4× = × = 8.4× = × =
3.8× = 12× = ×2.5= + =
× × = 72× × =
① ×34×17×
② ×12
③ × +
④2013×
⑤ × +
⑥ ×99+