脱式计算.25×45
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/26 16:09:15
脱式计算. 25×
![]() (1)25×
4 5+2.5% =20+2.5% =20.025; (2)9.6-11÷7+ 1 7×4 =9.6- 11 7+ 4 7 =9.6-( 11 7- 4 7) =9.6-1 =8.6; (3)12×[( 11 6- 2 3)×3] =12×[ 11 6×3- 2 3×3] =12×[ 11 2-2] =12× 11 2-12×2 =66-24 =42. |