12× = | ÷ = | 0÷ = | - = | 12×( × )= |
× = | ÷ = | 20÷ = | + = | ×90× = |
12× =8; | ÷ = ; | 0÷ =0; | - = ; | 12×( × )= ; |
× = ; | ÷ = ; | 20÷ =36; | + = ; | ×90× =50. |
,0,
,
,
,
,36,
,50.分析:根据分数四则混合运算的顺序,按照分数四则运算的计算法则,直接进行口算.
点评:此题考查的目的是牢固掌握分数四则运算的计算法则,并且能够正确熟练地进行口算,提高口算能力.
编辑:chaxungu时间:2026-04-26 08:33:44分类:小学数学题库
12× = | ÷ = | 0÷ = | - = | 12×( × )= |
× = | ÷ = | 20÷ = | + = | ×90× = |
12× =8; | ÷ = ; | 0÷ =0; | - = ; | 12×( × )= ; |
× = ; | ÷ = ; | 20÷ =36; | + = ; | ×90× =50. |
,0,
,
,
,
,36,
,50.