| 直接写出得数. 14÷35= | + = | 0.77+0.33= |
×4+4× = | 0.9+99× = | 4 -( + )= |
| 5-1.4-1.6= | 2- - = | ×2÷ ×2= |
( + )×12= | × = | 6.3×10%= |
解:14÷35= , | + = , | 0.77+0.33=1.1, |
×4+4× =2 , | 0.9+99× =90, | 4 -( + )=3 , |
| 5-1.4-1.6=2, | 2- - =1 , | ×2÷ ×2=4, |
( + )×12=14, | × = , | 6.3×10%=0.63. |
分析:0.9+99×
,(
+
)×12运用乘法分配律简算;4
-(
+
),5-1.4-1.6,2-
-
,根据减法的性质简算;其它题目根据运算法则直接求解.
点评:口算题目要求快速准确,能运用简算方法的要简算.
=
×4+4×
=
×2÷
×
=
,