1÷ = | + = | ÷ = | ( - )×18= |
÷3= | × = | - = | × ÷ × = |
1÷ =50, | + =1, | ÷ = , | ( - )×18=9, |
÷3= , | × = , | - = , | × ÷ × = . |
,9,
,
,
,
.分析:(
-
)×18运用乘法分配律简算;
×
÷
×
先把除法变成乘法,再运用乘法结合律简算;其它题目根据运算法则直接求解.
点评:本题考查了简单的分数计算,认真分析式中数据,根据运算法则和运算定律快速准确得出答案.
编辑:chaxungu时间:2026-04-27 10:22:05分类:小学数学题库
1÷ = | + = | ÷ = | ( - )×18= |
÷3= | × = | - = | × ÷ × = |
1÷ =50, | + =1, | ÷ = , | ( - )×18=9, |
÷3= , | × = , | - = , | × ÷ × = . |
,9,
,
,
,
.
-
)×18运用乘法分配律简算;
×
÷
×
先把除法变成乘法,再运用乘法结合律简算;