1.2×2.5+0.8×2.5=(
1.2
1.2
+
0.8
0.8
)×
2.5
2.5
分析:1.2×2.5+0.8×2.5,運用乘法分配律進行簡算.
解答:解:1.2×2.5+0.8×2.5,
=(1.2+0.8)×2.5,
=2×2.5,
=5;
故答案為:1.2、0.8、2.5.
點評:此題考查的目的是理解乘法分配律的意義,并且能夠靈活運用乘法分配律進行簡便計算.
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