× = | ÷ = | × = | ÷ = | 4÷ = |
×6÷ = | 6× +6× = | ( + )×16= | × = | 24%×5= |
× = , | ÷ = , | × = , | ÷ = , | 4÷ =5, |
×6÷ =6, | 6× +6× =6, | ( + )×16=6, | × = , | 24%×5=1.2. |
分析:分数乘法:分子相乘的积做分子,分母相乘的积做分母;
分数除法:除以一个不为零的数等于乘上这个数的倒数.
×6÷
运用乘法交换律简算;6×
+6×
,(
+
)×16运用乘法分配律简算.点评:本题考查了简单的运算,要注意根据运算法则和运算定律快速准确的得出答案.
×
=
÷
=
×
=
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=
=
×
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,