递等式计算 0.85x199 0.25x36 75x99+2x75
答案:3 悬赏:70 手机版
解决时间 2021-11-14 13:38
- 提问者网友:箛茗
- 2021-11-13 22:41
递等式计算 0.85x199 0.25x36 75x99+2x75
最佳答案
- 五星知识达人网友:何以畏孤独
- 2021-11-13 22:54
0.85×199
=0.85×(200-1)
=0.85×200-0.85×1
=170-0.85
=169.15
0.25×36
=0.25×4×9
=1×9
=9
75×99+2×75
=75×(99+2)
=75×(100+1)
=75×100+75×1
=7500+75
=7575追问谢谢
=0.85×(200-1)
=0.85×200-0.85×1
=170-0.85
=169.15
0.25×36
=0.25×4×9
=1×9
=9
75×99+2×75
=75×(99+2)
=75×(100+1)
=75×100+75×1
=7500+75
=7575追问谢谢
全部回答
- 1楼网友:舍身薄凉客
- 2021-11-13 23:48
0.85x199
=0.85×(200-1)
=0.85×200-0.85×1
=170-0.85
=169.15
0.25x36
=0.25×(4×9)
=(0.25×4)×9
=1×9
=9
75x99+2x75
=75×(99+2)
=75×101
=75×100+75×1
=7500+75
=7575追问谢谢
=0.85×(200-1)
=0.85×200-0.85×1
=170-0.85
=169.15
0.25x36
=0.25×(4×9)
=(0.25×4)×9
=1×9
=9
75x99+2x75
=75×(99+2)
=75×101
=75×100+75×1
=7500+75
=7575追问谢谢
- 2楼网友:像个废品
- 2021-11-13 23:04
0.85×(200—1)=0.85×200—0.85
0.25×4×9=1×9=9
75×(99+2)=75×(100+1)=75×100+75
0.25×4×9=1×9=9
75×(99+2)=75×(100+1)=75×100+75
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