⑴7.2-2x=5 ⑵3x-3×1.9=27.6
1.4×3.5+0.14÷2.8 15.72÷(15.72÷0.3)
204÷24= 52.2÷4.5= 23.25÷0.63≈
13.68÷1.9= 38÷57≈ △8.91÷0.33=