32+29+68+41=32+68+(29+41)這是根據(jù)( 。
 
分析:由算式的變化可以看出:29和68互換了位置,且32和68結(jié)合,29和41結(jié)合,所以是運用加法交換律與結(jié)合律.
解答:解:32+29+68+41
=(32+68)+(29+41)
=100+70
=170.
故選:C.
點評:簡算注意發(fā)現(xiàn)運算符號和數(shù)字特點,靈活選用運算定律簡算.
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