直接写得数. ×0= | × = | ×12= | × = |
45× = | ÷ = | × = | ÷ = |
18× = | × = | 1÷ = | ÷ = |
解: ×0=0; | × = ; | ×12=10; | × = ; |
45× =27; | ÷ =4; | × = ; | ÷ =2 ; |
18× =3; | × =1; | 1÷ =1 ; | ÷ =2 . |
分析:根据分数乘法、除法的计算法则直接进行口算即可.
点评:此题考查的目的是让学生牢固掌握分数乘法、除法的计算法则,并且能够正确迅速地进行口算,提高口算能力.
编辑:chaxungu时间:2026-04-26 09:02:30分类:小学数学题库
直接写得数. ×0= | × = | ×12= | × = |
45× = | ÷ = | × = | ÷ = |
18× = | × = | 1÷ = | ÷ = |
解: ×0=0; | × = ; | ×12=10; | × = ; |
45× =27; | ÷ =4; | × = ; | ÷ =2 ; |
18× =3; | × =1; | 1÷ =1 ; | ÷ =2 . |
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