8.4÷0.21÷0.5简便运算急用!

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/15 17:31:42
8.4÷0.21÷0.5简便运算急用!
x)39@D>_d'<_7YSV($JΆ]iC/Dw-$ , R<ٱٌMOv4<YgÓKJZ$Aj`qЊ 8"#xbp #= j*b*qʫ

8.4÷0.21÷0.5简便运算急用!
8.4÷0.21÷0.5简便运算急用!

8.4÷0.21÷0.5简便运算急用!
8.4÷0.21÷0.5
各个数扩大100倍
即840/21/50=40/50=0.8
因为是扩大一百倍
所以0.8*100=80

8.4÷0.21÷0.5
=40x0.21÷0.21÷0.5
=40÷0.5
=40x2
=80

8.4÷0.21÷0.5
=8.4÷0.21x2
=8.4÷2.1x20
=4x20
=80