25.8-12.5+170:17-8
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\(a\)\(=6+182+3.3\)
\(=188+9=197\)
\(b;15-200:50\)
\(=15-4=11\)
\(c;200-60+\frac{170}{7}-8\)
\(=140+\frac{114}{7}\)
\(=\frac{1094}{7}\)
a)18 : 3 + 182 + 3.(51:17)
= 6 + 182 + 3.3
= 188 + 9
= 197
b) 15 - 25.8:(100:2)
= 15 - 200 : 50
= 15 - 4
= 11
c) 25.8 - 12.5 + 170:17 - 8
= 200 - 60 + 10 - 8
= 142
![](https://rs.olm.vn/images/avt/0.png?1311)
a,27.75+25.27-150
=27.(75+25)-150
=27.100-150
=2700-150
=2550
c,13.17-256:16+14:7-1
=221-16+2-1
=205+2-1
=208-1
=207
d,18:3+182+3.(51:17)
=18:3+182+3.3
=6+182+9
=188+9
=197
e,15-25:8(100.2)
=15-25:8.200
=15-3,125.200
=15-625
=-610
f,25.8-12.5+170:17-8
=200-60+10-8
=140+10-8
=150-8
=142
![](https://rs.olm.vn/images/avt/0.png?1311)
\(272:16-5+4\left(30-6-255:17\right)\)
\(=17-5+4.9\)
\(=12+36\)
\(=48\)
\(25.8-12.5+272:17-8\)
\(=200-60+16-8\)
\(=140+16-8\)
\(=148\)
- 272 : 16 - 5 + 4(30 - 6 - 255 : 17)
= 17 - 5 + 4.9
= 12 + 36
= 48
2. 25 . 8 - 12.5 + 272 : 17 - 8
= 200 - 60 + 16 - 8
= 140 + 16 - 8
= 148
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 12.18 + 14.3 – 255:17
= 216 + 42 – 15
= 273
b) 13 + 42.5 – (198:11 – 8)
= 13 + 210 – 10
= 213
c) 25.8 – 12.5 + 272:17 – 8
= 200 – 60 +16 – 8
= 148
d, 2 3 - 5 3 : 5 2 + 12 . 2 2
= 8 – 5 +48
= 51
![](https://rs.olm.vn/images/avt/0.png?1311)
tính nhanh hay tính bình thường???
tính bình thường nhoa:
52
148
17
k nhoa
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 12 : { 400 : [ 500 - ( 125 + 25 . 7 )]}
= 12 : { 400 : [ 500 - ( 125 + 175 )]}
= 12 : { 400 : [ 500 - 300 ]}
= 12 : { 400 : 200 }
= 12 : 2
= 6
b) 5 . 22 - 18 : 3
= 110 - 6
= 104
c) 18 : 3 + 182 + 3 . ( 51 : 17 )
= 6 + 182 + 3.3
= 6 + 182 + 9
= 197
d) 25.8 - 12.5 + 170 : 17 - 8
= 1000 - 60 + 10 - 8
= 940 + 10 - 8
= 940 + 2
= 942
![](https://rs.olm.vn/images/avt/0.png?1311)
a, mk làm kết quả lun.
=12:{400:[500-(125+175)]}
=12:{400:[500-300]}
=12:{400:200}
=12:2
=6
b,
=110-18:3
= 110-6
=104
k mk nha. k xong mk làm tiếp. dài quá nhưng cx dễ
25.8 - 12.5 + 170 : 17 - 8
= 200 - 60 + 10 - 8
= 142