×4= | × = | + = | × = | × = |
÷ = | 0÷ = | × = | 0×10= | × = |
+ = | - = | 0÷ = | ÷ = | ×4= |
3× 1= | + = | - = | 1÷( - )= | 4÷ ×4= |
解: ×4=3; | × =2; | + = ; | × = ; | × = ; |
÷ = ; | 0÷ =0; | × = ; | 0×10=0; | × =1 ; |
+ = ; | - = ; | 0÷ =0; | ÷ =1 ; | ×4=1 ; |
3× 1=1 ; | + = ; | - = ; | 1÷( - )=9; | 4÷ ×4=64. |
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,直接进行口算即可.
点评:此题考查的目的是牢固掌握分数四则混合运算的顺序和分数四则运算的计算法则,并且能够正确熟练地进行口算.
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