第1个回答 2021-04-29
35×(7×4)=35×7×2×2=(35×2)×(7×2)=70×14=980
如果觉得70×14还麻烦,可以再拆70×14=70×7×2=490×2=980
第2个回答 2021-04-29
35×(7×4)
=35×2×7×2
=70×14
=980
第3个回答 2021-04-29
35×(7×4)
=5×7×7×4
=7×7×20
=49×20
=980
第4个回答 2021-04-29
35×(7×4)
=35x28
=35x(30-2)
=35x30-35x2
=1050-70
=980