几道简算题41.1/17×4/9+5/17×1/92.1/7×3/4+3/7×1/6+6/7×1/123.5/9×79又16/17+50×1/9+1/9×5/174.5/17×3/8+1/15×7/16+1/15×3又1/2
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/07 11:15:44
![几道简算题41.1/17×4/9+5/17×1/92.1/7×3/4+3/7×1/6+6/7×1/123.5/9×79又16/17+50×1/9+1/9×5/174.5/17×3/8+1/15×7/16+1/15×3又1/2](/uploads/image/z/2932063-7-3.jpg?t=%E5%87%A0%E9%81%93%E7%AE%80%E7%AE%97%E9%A2%9841%EF%BC%8E1%2F17%C3%974%2F9%EF%BC%8B5%2F17%C3%971%2F92%EF%BC%8E1%2F7%C3%973%2F4%EF%BC%8B3%2F7%C3%971%2F6%EF%BC%8B6%2F7%C3%971%2F123%EF%BC%8E5%2F9%C3%9779%E5%8F%8816%2F17%EF%BC%8B50%C3%971%2F9%EF%BC%8B1%2F9%C3%975%2F174%EF%BC%8E5%2F17%C3%973%2F8%EF%BC%8B1%2F15%C3%977%2F16%EF%BC%8B1%2F15%C3%973%E5%8F%881%2F2)
几道简算题41.1/17×4/9+5/17×1/92.1/7×3/4+3/7×1/6+6/7×1/123.5/9×79又16/17+50×1/9+1/9×5/174.5/17×3/8+1/15×7/16+1/15×3又1/2
几道简算题4
1.1/17×4/9+5/17×1/9
2.1/7×3/4+3/7×1/6+6/7×1/12
3.5/9×79又16/17+50×1/9+1/9×5/17
4.5/17×3/8+1/15×7/16+1/15×3又1/2
几道简算题41.1/17×4/9+5/17×1/92.1/7×3/4+3/7×1/6+6/7×1/123.5/9×79又16/17+50×1/9+1/9×5/174.5/17×3/8+1/15×7/16+1/15×3又1/2
1.1/17×4/9+5/17×1/9
= 1/17×4/9+1/17×5/9
= 1/17×(4/9+5/9)
= 1/17
2.1/7×3/4+3/7×1/6+6/7×1/12
= 3/7×1/4+3/7×1/6+3/7×1/6
= 3/7×(1/4+1/6+1/6)
= 3/7×7/12
= 1/4
3.5/9×79又16/17+50×1/9+1/9×5/17
= 5/9×(179又16/17+10+1/17)
= 5/9×90
= 50
4.5/17×3/8+1/15×7/16+1/15×3又1/2
= 7/15×3/8+7/15×1/16+7/15×1/2
= 7/15×(3/8+1/16+1/2)
= 7/16
1.
1/17×4/9+5/17×1/9=(1×4+5×1)/(9×17)=9/(9×17)=1/17
2.
1/7×3/4+3/7×1/6+6/7×1/12=1/7×9/12+3/7×2/12+6/7×1/12
=(1×9+3×2+6×1)/(7×12)=21/(7×12)=1/4
3.
5/9×79又16/17+50×1/9+1/9×5/17
=
4.