用简便方法计算:7.8*53.9+5.39*22用简便方法计算:0.01+0.02+0.03+0.04+···0.97+0.98+0.99

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/29 19:23:11
用简便方法计算:7.8*53.9+5.39*22用简便方法计算:0.01+0.02+0.03+0.04+···0.97+0.98+0.99

用简便方法计算:7.8*53.9+5.39*22用简便方法计算:0.01+0.02+0.03+0.04+···0.97+0.98+0.99
用简便方法计算:7.8*53.9+5.39*22
用简便方法计算:0.01+0.02+0.03+0.04+···0.97+0.98+0.99

用简便方法计算:7.8*53.9+5.39*22用简便方法计算:0.01+0.02+0.03+0.04+···0.97+0.98+0.99
7.8*53.9+5.39*22
=7.8*53.9+53.9*2.2
=53.9*(7.8+2.2)
=53.9*10
=539