十八点九乘以三点四加一点八九乘以六十六这怎么算？

• 十九乘以66加上81乘66怎么算
• 七点三乘四点九加一点七三怎么简便计算
• 96.51乘三点一加三点一乘四点四九减三点一的简便运算
• 1/4乘3/8乘4/9计算下面各题怎样简便就怎样算?

十九乘以66加上81乘66怎么算

134乘以8加8乘66 =134x8 =(134+66)x8 =200x8 =1600

七点三乘四点九加一点七三怎么简便计算

7.3×4.9+1.73

=7.3×4.9+1+0.73

=7.3×4.9+7.3×0.1+1

=7.3×（4.9+0.1）+1

=7.3×5+1

=36.5+1

=37.5

96.51乘三点一加三点一乘四点四九减三点一的简便运算

96.51×3.1+3.1×4.49-3.1

=（96.51+4.49-1）×3.1

=100×3.1

=310

1/4乘3/8乘4/9计算下面各题怎样简便就怎样算?

先算1/4乘以4/9,得出1/9,再求1/9乘以3/8,求得答案1/24.