7.5×99+3×7.5+2.5×102简便运算
答案:4 悬赏:70 手机版
解决时间 2021-11-24 05:23
- 提问者网友：骑士
- 2021-11-23 22:20
7.5×99+3×7.5+2.5×102简便运算
最佳答案
- 五星知识达人网友：封刀令
- 2021-11-23 23:14
7.5×99+3×7.5+2.5×102
=7.5×(99+3)+2.5×102
=7.5×102+2.5×102
=102×(7.5+2.5)
=102×10
=1020
=7.5×(99+3)+2.5×102
=7.5×102+2.5×102
=102×(7.5+2.5)
=102×10
=1020
全部回答
- 1楼网友：雾月
- 2021-11-24 02:19
7.5×99+3×7.5+2.5×102
= 2.5×300 - 2.5×3 + 2.5×9 + 2.5×102
= 2.5×400 + 2.5×8
= 1020
= 2.5×300 - 2.5×3 + 2.5×9 + 2.5×102
= 2.5×400 + 2.5×8
= 1020
- 2楼网友：归鹤鸣
- 2021-11-24 01:23
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- 3楼网友：掌灯师
- 2021-11-24 00:01
7.5×99+3×7.5+2.5×102
=7.5×99+1×7.5+2×7.5+2.5×2×51
=7.5×100+15+5×51
=750+15+255
=750+15+250+5
=1020
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