直接写出得数。9.12+4.5+0.88= 8.43+2.97+0.03= 10-2.75-0.25=4.9+4.9-0.9-0.9= 5.6+2.7-3.6= 15.25-3.1+0.75-4.9=
计算:(9+7)÷(+)
计算:3×25 + 37.9×6
计算:(1)2000÷2000(2)
(1)×39 + ×25 + × (2)1×(2 - )+ 15÷
计算: (1)73× (2) 166÷41