| 直接写结果. 1÷ = | × = | ÷ = |
+ × = | ÷ = | ÷2= |
÷ = | 1÷7× = | × = |
÷ = | ÷ = | × ÷ × = |
1÷ =6, | × = , | ÷ = , |
+ × = , | ÷ =1, | ÷2= , |
÷ = , | 1÷7× = , | × = , |
÷ =4, | ÷ = , | × ÷ × = . |
,
,
,1,
,
,
,
,4,
,
.分析:
+
×
先算乘法再算加法;1÷7×
先算除法,再算乘法;
×
÷
×
先把除法变成乘法,再运用乘法结合律简算;其它题目按照运算法则直接求解.点评:本题考查了基本的计算题目,计算时要细心,特别是运算的顺序,不要弄错,注意把结果化成最简分数.
×
=
÷
÷
÷
=
×
=
÷
=
÷
=