四年級(jí)數(shù)學(xué)口算練習(xí)題：小數(shù)的加法和減法

2.94 - 2.66 =7.23 + 2.43 =6.15 + 5.53 =
    7.89 + 2.27 =5.64 - 2.05 =8.6 + 9.63 =
    4.23 + 1.89 =4.66 + 2.57 =9.95 + 2.24 =
    5 + 2.19 =5.6 - 2.6 =3.44 - 1.1 =
    9.4 - 6.14 =8.85 + 4.4 =9.07 - 8.21 =