直接写得数 ×5= | ÷ = | 10× = | ÷ = |
× ÷ × = | 99× + = | 3- - = | 1÷4× = |
(![]() )÷6= | ÷ ÷1= |
解: ×5=2 ; | ÷ =4; | 10× =1 ; | ÷ =1.4; |
× ÷ × = ; | 99× + =10; | 3- - =2; | 1÷4× = ; |
(![]() )÷6= ; | ÷ ÷1= . |
,4,
,1.4,
,10,2,
,
,
.分析:依据四则运算计算方法解答,其中:解答99×
+
=和(
)÷6=时,运用乘法分配律,解答3-
时运用减法性质.点评:本题主要考查学生运用四则运算计算方法,以及四则运算简便算法解决问题的能力.
×5=
÷
=
=
÷
=
×
-
=
=
÷1=