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7.03+6.3+2.97+3.7=(7.03+2.97)+(6.3+3.7)應(yīng)用了加法的
 
律和
 
律.
分析:通過觀察,算式7.03+6.3+2.97+3.7=(7.03+2.97)+(6.3+3.7)中,先交換數(shù)字位置,再進行數(shù)字結(jié)合,因此此題運用了加法交換律和結(jié)合律.
解答:解:7.03+6.3+2.97+3.7
=(7.03+2.97)+(6.3+3.7)
=10+10
=20
此題運用了加法的交換律和結(jié)合律.
故答案為:交換;結(jié)合.
點評:此題考查了學(xué)生對加法運算定律的掌握與運用情況.
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