1: 58.42 58.42
584.2 5.482
2: 16.8 53.2 42.48
3: 42 119.48
5.92 6.678
4: 1.6×1.2÷2
=0.96
8×5.2=41.6
﹙7.4+14.6﹚×5.7÷2
=22×5.7÷2
=62.7
5: 2.8×5=14
2.8×16=44.8
提交 重置