9.8*9.9+0.98用简便方法计算
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/08/20 05:15:45
9.8*9.9+0.98用简便方法计算
![9.8*9.9+0.98用简便方法计算](/uploads/image/z/2290853-29-3.jpg?t=9.8%2A9.9%2B0.98%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97)
9.8×9.9+0.98
=9.8×(10-0.1)+0.98
=9.8×10-9.8×0.1+0.98
=98-0.98+0.98
=97.2+0.98
=98
=9.8×(10-0.1)+0.98
=9.8×10-9.8×0.1+0.98
=98-0.98+0.98
=97.2+0.98
=98