①5.3×1.25.3 ②3.6×0.93.6÷0.9 ③9.56÷0.1956×0.1
0.67 3÷8
( )有几棵树?
8+39= 69÷3= 400×9= 2.6+0.7=
18﹣2.5= + = ×5= 20× =
0.356×100= 4÷28= 15: = 98×12≈