Question

369x123-123x49-360x23=? 简便计算 怎么做？ 越简便越好 小学四年级的题 急急急急急急！！！！！

Answer 1

=123 ×（369-49）- 360×23
=123 × 320 - 360 × 23
=123 ×（360- 40） - 360 × 23
=123 × 360 - 360 × 23 - 123 × 40
=360 × （123 - 23 ）- 123 × 40
=360 ×100 -123 × 40
=36000 - 4920
=31080

Answer 2

=(369-49)*123-360*23
=320*123-360*23
=（360-40）*123-360*23
=360*（123-23）-40*123
=36000-4920
=31080

Answer 3

=369-360X23X49
=9X23X49
=207X49
=10143

Answer 4

369x123-123x49-360x23
=45387-6027-8280
=31080

Answer 5

369*123-123*49-360*23=（369-49）*100+23*（369-49-360）=320*100-40*23=32000-920=31080