口算 (1)3.2×0.2 1.4×0.4 3.3÷3 1.2÷0.3 (2)2.5×0.4 1.5×2 0.7×7 7.3+0.3 (3)0.53-0.3 1.8×0.5 0.9×0.01 0.23×3 (4)0.56÷8 1.23×3 1.6÷0.04 7.3+2.7 (5)2-1.2 7.8÷6 8.4÷0.21 8.4÷0.7 (6)5.6+3.6 9-2.35 0.56÷8 1.23×3 (7)5.6÷0.4 4.5÷0.9 8.1×2 90÷3 (8)1.23+3 5.6+1.23 4.5×2 5.6÷1.4 (9)4.8÷1.2 7.2÷0.9 6.6÷1.1 7.2÷6 (10)2.1÷3 0.6×0.5 3.23×2 1.8÷3 (11)12.5÷0.1 0.32÷0.8 1.6+3.7 0.45×0.2 (12)0.36÷1.8 0.4×0.5 8.4+5.6 8.4÷2.1 (13)4.8÷0.08 4.8÷0.8 3+2.3 9.3÷3 (14)0.01×8 7.31×100 0.09×6 0.8×0.6 (15)1.25×8 3÷5 2.3+2.3 6.23+3.6. |