(1.98×4/7+0.12)÷1.75=(1.13142857+0.12)÷1.75=1.2542857÷1.75=1.2或者1.98×4/7+0.12÷1.75 =1.13142857+0.0685714286 =1.199999986这道题的答案可以有两种情况,一个是1.2,另一个是1.199999986