如题所述
第1个回答 2020-01-13
39×132+78×34
=39×2×66+78×34
=78×66+78×34
=78×(66+34)
=78×100
=7800本回答被网友采纳
=39×2×66+78×34
=78×66+78×34
=78×(66+34)
=78×100
=7800本回答被网友采纳
第2个回答 2020-01-13
39×132+78×34
=39×132+39×2×34
=39×(132+68)
=39×200
=7800
=39×132+39×2×34
=39×(132+68)
=39×200
=7800