1. (2019五上·京山期中) 直接写出得数。

3.5×0.4=       7.2÷0.8=         4÷8=          2.9a+4.5a=

3.6+5.7=       4.5-2.8=          42×5=        1.25×0.7×8=

1.6÷0.16=      12-0.9=          0.3²=         0.25×4÷0.25×4=