a) 52×43+13=.........................................b) 73−23:57=.........................................c) 34×52−32=.....................................
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Giải thích
a) 52×43+13=103+13=113b) 73−23:57=73−23×75=73−1415=3515−1415=2115=75c) 34×52−32=34×22=34×1=34