1. (2023四下·青白江期末) 直接写出得数。                                                                                                                                      

①6.43-0.4=	②3.6+4.2=	③8-3.2=	④6-0.03=
⑤31.6-1.32=	⑥5.2+3.06=	⑦0.6×4=	⑧0.5×1.3=
⑨0.42×3=	⑩0.08×5=	⑪5.07×10=	⑫2.6×0.5=