1
4
×
1
5
÷
1
4
×
1
4
=1
×
×
.(判斷對錯)
分析:在計算
1
4
×
1
5
÷
1
4
×
1
4
時,應(yīng)按運算順序從左往右依次運算.也可調(diào)整運算順序,使計算簡便.
解答:解:
1
4
×
1
5
÷
1
4
×
1
4
,
=
1
20
×4×
1
4
,
=
1
5
×
1
4
,
=
1
20

故答案為:×.
點評:解答此題,應(yīng)注意運算順序.此題也可這樣解答:
1
4
×
1
5
÷
1
4
×
1
4
=
1
4
÷
1
4
×
1
5
×
1
4
=1×
1
5
×
1
4
=
1
20
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