直接写出下列各题的得数，你是最快的！ 2.1+3.4=________	720-80=________	2.6-1.7=________	1.4-0.6=________
0.3×40=________	1.25×3×8=________	3.8×0=________	0.9+99×0.9=________
7÷1.4=________	390×0.02=________	2.5+1.8=________	6.5×4×0.2=________
8×=________	÷=________	44÷=________	4×（0.6+1.9）=________
+=________	0.9-0.26=________	14.5+9.5=________	（0.18+0.9）÷9=________
18÷36=________	1.9×4×0.5=________	7.2÷8×4=________	78-0.8=________
62-35=________	20×5.5=________	1.68+1.5=________	×12=________
8.3+1.7=________	11.3-8.6=________	2.4-0.5=________	÷=________
+=________	3.25×4=________	÷2=________	÷3=________
24×5=________	0.77+0.33=________	×=________	12.6÷3=________
3.14×25=________	3.14×36=________	0.082=________	8л=________
1.4：________==________÷10=________%