7x25x3x4的简算
第1个回答 2022-11-18
使用乘法交换律与结合律,将25和4结合
7x25x3x4=(25x4)x(7x3)=100x21=2100
7x25x3x4=(25x4)x(7x3)=100x21=2100
第2个回答 2022-11-18
简便方法是
7x25x3x4
=7x3x(25x4)
=21x100
=2100
7x25x3x4
=7x3x(25x4)
=21x100
=2100
第3个回答 2022-11-18
25X4=100,7X3=21,100X21=2100
第4个回答 2022-11-18
先算25x4=100
7x25x3x4
=7x3x(25x4)
=7x3x100
=21x100
=2100本回答被网友采纳
7x25x3x4
=7x3x(25x4)
=7x3x100
=21x100
=2100本回答被网友采纳
第5个回答 2022-11-18
7x25x3x4
=(7x3)x(25x4)
=21x100
=2100
=(7x3)x(25x4)
=21x100
=2100