【脱式简算】1.5×105,1.9×4.5+0.45.急丫丫丫丫丫丫
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 10:03:03
![【脱式简算】1.5×105,1.9×4.5+0.45.急丫丫丫丫丫丫](/uploads/image/z/14062205-29-5.jpg?t=%E3%80%90%E8%84%B1%E5%BC%8F%E7%AE%80%E7%AE%97%E3%80%911.5%C3%97105%2C1.9%C3%974.5%2B0.45.%E6%80%A5%E4%B8%AB%E4%B8%AB%E4%B8%AB%E4%B8%AB%E4%B8%AB%E4%B8%AB)
【脱式简算】1.5×105,1.9×4.5+0.45.急丫丫丫丫丫丫
【脱式简算】1.5×105,1.9×4.5+0.45.急丫丫丫丫丫丫
【脱式简算】1.5×105,1.9×4.5+0.45.急丫丫丫丫丫丫
1.5×105
=1.5×(100+5)
=150+7.5
=157.5
1.9×4.5+0.45
=19×0.45+0.45
=(19+1)×0.45
=20×0.45
=9