Question

72×5+72×4+72 简便计算？

Answer 1

72×5＋72×4＋72
＝72×（5十4＋1）
＝72x10
＝720

Answer 2

72x（5+4+1）
＝72x10
＝720

Answer 3

72×(5+4+1)
=72×10
=720

Answer 4

=（5+4+1）X72
=10X72
=720

Answer 5

72×5+72×4+72
=72×（5+4+1）
=72×10
=720