Practice oral arithmetic every day, and use Qingdao edition in grade three and next semester, with 78 pages and 79 pages, for reference.
32.8+ 19=5 1.8
5.2÷ 1.3=4
1.6×0.4= 0.64
4.9×0.7=3.43
1÷5=0.2
6÷ 12=0.5
0.87-0.49=0.38
456+45=50 1
546-457=89
45× 10=450
879+54=933
896-546=350