巧算0.8+8.8+88.8+888.8+8888.8+88888.8+888888.8,
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/17 05:07:50
巧算0.8+8.8+88.8+888.8+8888.8+88888.8+888888.8,
0.8+8.8+88.8+888.8+8888.8+88888.8+888888.8
=0.8x7+8x6+80x5+800x4+8000x3+80000x2+800000x1
=5.6+48+400+3200+24000+160000+800000
=760000+24000+3200+400+48+5.6
=784000+3200+400+48+5.6
=787200+448+5.6
=787648+5.6
=787653.6
=0.8x7+8x6+80x5+800x4+8000x3+80000x2+800000x1
=5.6+48+400+3200+24000+160000+800000
=760000+24000+3200+400+48+5.6
=784000+3200+400+48+5.6
=787200+448+5.6
=787648+5.6
=787653.6