1.直接写出得数。         

1-0.1=                    1.2×50=                 4.8÷16=             2-2÷8=

0.33+0.7=                 36÷0.9=                0.12÷0.4=            1÷0.25×4=

2.列竖式计算。

5.72÷2.6=                    3.6÷0.24=                  75.9÷15=

3.递等式计算。

4.2+25.8÷3                                 7.5÷4÷2.5

12.5×(9.6÷3)×2.5                        24÷[0.3×(8-6.4)]