21.5乘以1.9加2.15乘以81 简便运算

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/22 14:52:33
21.5乘以1.9加2.15乘以81简便运算21.5乘以1.9加2.15乘以81简便运算21.5乘以1.9加2.15乘以81简便运算21.5乘以1.9加2.15乘以81=21.5×1.9+2.15×8

21.5乘以1.9加2.15乘以81 简便运算
21.5乘以1.9加2.15乘以81 简便运算

21.5乘以1.9加2.15乘以81 简便运算
21.5乘以1.9加2.15乘以81
=21.5×1.9+2.15×81
=2.15×(19+81)
=2.15×100
=215;

21.5*1.9+2.15*81
=21.5*1.9+21.5*8.1
21.5*(1.9+8.1)
=21.5*10
=215望采纳

都写成分式然后提公因式20分子43

=21.5×1.9+2.15×81
=2.15×(19+81)
=2.15×100
=215

计算器