第九道题简便用算，有没有数学老师帮忙做一下，简便运算？
答案:4 悬赏:10 手机版
解决时间 2021-01-26 09:34
- 提问者网友：心如荒岛囚我终老
- 2021-01-26 00:28
第九道题简便用算，有没有数学老师帮忙做一下，简便运算？
最佳答案
- 五星知识达人网友：痴妹与他
- 2021-01-26 01:36
追答
亲，回答满意吗，采纳呦
亲，回答满意吗，采纳呦
全部回答
- 1楼网友：归鹤鸣
- 2021-01-26 03:02
- 2楼网友：青尢
- 2021-01-26 02:05
小学数学？
- 3楼网友：逐風
- 2021-01-26 01:57
2.02X8.5
=2X8.5+0.02X8.5
=17+0.17
=17.17
1.25+4.6+0.75
=1.25+0.75+4.6
=2+4.6
=6.6
1.6X7.5X1.25
=2X7.5X(0.8X1.25)
=15X1
=15
56X1.25
=7X8X1.25
=7X(8X1.25
=7X10
=70
3.4X1.7X1.5
=2X1.7X1.7X1.5
=2X1.5X1.7X1.7
=3X1.7X1.7
=5.1X1.7
=5X1.7+0.1X1.7
=8.5+0.17
=8.67
0.8X0.25X0.4X12.5
=0.8X12.5X(0.25X0.4)
=10X0.1
=1追答满意吧?
=2X8.5+0.02X8.5
=17+0.17
=17.17
1.25+4.6+0.75
=1.25+0.75+4.6
=2+4.6
=6.6
1.6X7.5X1.25
=2X7.5X(0.8X1.25)
=15X1
=15
56X1.25
=7X8X1.25
=7X(8X1.25
=7X10
=70
3.4X1.7X1.5
=2X1.7X1.7X1.5
=2X1.5X1.7X1.7
=3X1.7X1.7
=5.1X1.7
=5X1.7+0.1X1.7
=8.5+0.17
=8.67
0.8X0.25X0.4X12.5
=0.8X12.5X(0.25X0.4)
=10X0.1
=1追答满意吧?
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