15-25.8.(100.2)
4. Thực hiện phép tính a) 150 + 50 : 5 + 2 . 9 b) 1121:1119 + 215.8:217 c) 15 − [(25.8):(100.2)] d) 60:{[(12 − 3).2] + 2}
a: \(150+50:5+2\cdot9\)
=150+10+18
=178
Bài 2.Thực hiện phép tính
a,27.75+25.27-150
c,13.17-256:16+14:7-1
d,18:3+182+3.(51:17)
e,15-25:8(100.2)
f,25.8-12.5+170:17-8
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
12:1400.(500-(125+25.70 tôi ko biết làm
2: Thực hiện phép tính (B1 trang 8 BD năng lực tự học)
1. 12.18+14.3-225:17
2. 68+42.5-625:25
3. 13+21.5-(198:11-8)
4. 272:16-5+4.(30-5-255:17)
5. 25.8-12.5+272:17-8
6. 125:25+14-142:71
7. 13.17-256:16+14:7-1
8. 15.24-14.5.(145:5-27)
9. 289:17-324:18+18:3 10.18.3-182+3.(51:17)
11.(64+115+36)-25.8
12.15.8-(17-30+83)-144:6
13.19+19.99-25.8 14.250:50-(46-75+54):5
15.13.(17-95+83):5-18:9
16.140-180.(47-90+43)+7
17.24.(15+30+85-120):10
18.27+73-30: (25-10)
19.18-4.(27-90+73):10
20.15-25.8:(100.2)
1. 12.18+14.3-255:17=216+42-15
=258-15
=243
tìm x bít:x:15+95=15+25.8
\(\frac{x}{15}+95=15+25\times8\)
\(\frac{x}{15}=15+200-95\)
\(\frac{x}{15}=120\)
\(x=120\times15\)
\(x=1800\)
\(\frac{x}{15}+95=15+25\cdot8\)
\(\frac{x}{15}+95=215\)
\(\frac{x}{15}=215-95=120\)
\(x=120\cdot15=1800\)
Tìm x biết: x : 15+95= 15+ 25.8
x : 15 +95 = 15 + 200
x : 15 +95 = 215
x : 15 = 215 -95
x : 15 = 120
x = 120 x 15
x= 1800
nho k
\(x:15+95=15+25.8\)
\(x:15+95=15+200\)
\(x:15+95=215\)
\(x:15=215-95\)
\(x:15=120\)
\(x=120.15\)
\(x=1800\)
Chúc bạn học tốt!thực hiệ phép tính
18:3+182+3.(51:17)
15-25.8: ( 100 : 2)
25.8 -12.5+170:17-8
\(a\)\(=6+182+3.3\)
\(=188+9=197\)
\(b;15-200:50\)
\(=15-4=11\)
\(c;200-60+\frac{170}{7}-8\)
\(=140+\frac{114}{7}\)
\(=\frac{1094}{7}\)
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
a)[504-(25.8+70)]:9-15+190
b)5.{26-[3.(5+2.5)+15]:15}
Giúp mình với ạ
a: \(\left[504-\left(25\cdot8+70\right)\right]:9-15+19^0\)
\(=\left(504-270\right):9-15+1\)
\(=29-14\)
=15
a) [504 - (25 . 8 + 70)] : 9 - 15 + 190
[504 - (25 . 8 + 70)] : 9 - 15 + 1
[504 - (200 + 70)] : 9 - 15 + 1
(504 - 270) : 9 - 15 + 1
234 : 9 - 15 + 1
= 26 - 15 + 1
= 11 + 1
= 12
b) 5 . {26 - [3 . (5 + 2 . 5) + 15] : 15}
5 . {26 - [3 . (5 + 10) + 15] : 15}
5 . [26 - (3 . 15 + 15) : 15]
5 . [26 - (45 + 15) : 15]
5 . (26 - 60 : 15)
5 . (26 - 4)
= 5 . 22
= 110
Tìm x , biết : x:15+42=15+25.8.Kết quả là x bằng :
25.8×11.02-1.01×25.8-10×25.8
\(25,8\times11,02-1,01\times25,8-10\times25,8\)
\(=25,8\times\left(11,02-1,01-10\right)\)
\(=25,8\times0,01\)
\(=0,258\)
Học tốt
\(25,8\times11,02-1,01\times25,8-10\times25,8\)
\(=25,8\times(11,02-1,01-10)\)
\(=25,8\times0,01\)
\(=0,258\)
học tốt
Nhớ kết bạn với mình