作业帮奥数 简便运算41.2X8.1+11X9.25+53.7X1.9
来源：学生作业帮 编辑：拍题作业网作业帮 分类：数学作业 时间：2024/04/29 04:57:25
奥数 简便运算
41.2X8.1+11X9.25+53.7X1.9
41.2X8.1+11X9.25+53.7X1.9
41.2×8.1+11×9.25+53.7×1.9
=41.2×8.1+11×9.25+(41.2+12.5)×1.9
=41.2×8.1+41.2×1.9+11×9.25+12.5×1.9
=41.2×(8.1+1.9)+11×(8+1.25)+12.5×1.9
=41.2×10+11×8+11×1.25+12.5×1.9
=412+11×8+1.1×12.5+12.5×1.9
=412+88+12.5×(1.1+1.9)
=412+88+37.5
=537.5
=41.2×8.1+11×9.25+(41.2+12.5)×1.9
=41.2×8.1+41.2×1.9+11×9.25+12.5×1.9
=41.2×(8.1+1.9)+11×(8+1.25)+12.5×1.9
=41.2×10+11×8+11×1.25+12.5×1.9
=412+11×8+1.1×12.5+12.5×1.9
=412+88+12.5×(1.1+1.9)
=412+88+37.5
=537.5
奥数 简便运算41.2X8.1+11X9.25+53.7X1.9
求41.2x8.1+11x1.25+53.7x1.9的简便运算
怎么简便计算下面两题 41.2x8.1+11x1.25+53.7x1.9=
41.2X8.1+1.1X12.5+53.7X1.9
我有这样的一组数 X1=1 X2=3 X3=7 X4=14 X5=25 X6=41 X7=63 X8=92 X9=129
用简便方法计算 2.5x3.2x1.25 1.98x9.9
已知x1^3+x2^3+.+x8^3-x9^3的个位数字是1,其中,x1,x2,.,x9是2001,2002,.,200
已知x1^3+x2^3+.+x8^3-x9^3的个位数字是1,其中,x1,x2,...,x9是2001,2002,.20
11.2x8.1+5/4+53.7x1.9 简算
125X36】X8简便运算
125%X8/25+1.25X0.54+1.25X14%简便运算
（125+9）x8 这道题怎么用简便运算做?