____ ____ ____get this job,Mr.Green made lots of preparations.
____都是举世闻名的.
0.56÷0.7=____
0.6+0.65=____
3.9÷1.3=____
12÷0.03=____
5.2÷0.13=____
99×1.01=____
13.5﹣2.8﹣7.2=____
25×0.32×125=____
计算:2ab+3ab=____ .