这道计算题怎么简算?9.81×0.1+0.5×98.1+0.049×981
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/28 13:10:42
![这道计算题怎么简算?9.81×0.1+0.5×98.1+0.049×981](/uploads/image/z/761850-18-0.jpg?t=%E8%BF%99%E9%81%93%E8%AE%A1%E7%AE%97%E9%A2%98%E6%80%8E%E4%B9%88%E7%AE%80%E7%AE%97%3F9.81%C3%970.1%2B0.5%C3%9798.1%2B0.049%C3%97981)
这道计算题怎么简算?9.81×0.1+0.5×98.1+0.049×981
这道计算题怎么简算?
9.81×0.1+0.5×98.1+0.049×981
这道计算题怎么简算?9.81×0.1+0.5×98.1+0.049×981
9.81×0.1+0.5×98.1+0.049×981
=981×0.001+0.05×981+0.049×981
=981×(0.001+0.05+0.049)
=981×0.1
=98.1
9.81*(0.1+5+4.9)=98.1
原式可变形为:9.81×0.1+5×9.81+9.81×4.9
=9.81×(0.1+5+4.9)
=9.81×10
=98.1
(9.81×0.1+0.5×98.1+0.049×981 )*1000/1000=(981*1+50*981+49*981)/1000=
981*(1+50+49)/1000=
98.1
原式=9.81*0.1+9.81*5+9.81*4.9
=9.81*(0.1+4.9+5)
=9.81*10
=98.1