× = | × × = | ÷3= | 12× = | + - + = |
20÷ = | 18÷ ÷ = | × = | 0× = | × ÷ × = |
解: × = ; | × × = ; | ÷3= ; | 12× =9; | + - + =1 ; |
20÷ =45; | 18÷ ÷ =45; | × = ; | 0× =0; | × ÷ × = . |
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:此题考查的目的是理解掌握分数四则混合运算的顺序,以及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:2026-04-27 07:35:16分类:小学数学题库
× = | × × = | ÷3= | 12× = | + - + = |
20÷ = | 18÷ ÷ = | × = | 0× = | × ÷ × = |
解: × = ; | × × = ; | ÷3= ; | 12× =9; | + - + =1 ; |
20÷ =45; | 18÷ ÷ =45; | × = ; | 0× =0; | × ÷ × = . |