直接写得数(每题1分,共12分)
(1)3.2÷0.1= (2)48×=
(3)1﹣= (4)0.125÷
=
(5)0.5÷1%= (6)0.5×40=
(7)3989÷49≈ (8)+
+
=
(9)99×1.5+1.5= (10)8×(12+0.5)=
(11)(﹣
)×18= (12)7.5﹣(2.5+3.8)=