Tính: 2345 - 1000 : [ 19-2(21-18)2]
A.2345
B.100
C.1000
D.10 000
Thực hiện phép tính:
2345-1000:(19-2.(21-18)^2)
2345-1000:(19-2.(21-18)^2)
= 2345 - 1000 : (19 - 2.32)
= 2345 - 1000 : (19 - 2.9)
= 2345 - 1000 : 1
= 2345 - 1000
= 1345
HỌC TỐT
2345-1000:(19-2.(21-18)^2)
= 2345-1000:(19-2.9)
= 2345-1000:(19-18)
= 2345-1000:1
= 2345-1000
=1345
Thực hiện phép tính (Tính nhanh nếu có thể)
a) 2345 − 1000 : [19-2(21-18) 2 ]
b) 205 − [ 1200 − ( 4 2 − 2.3 ) 3 ]
a) 2345 − 1000 : [19-2(21-18) 2 ]=2345-1000:1=1345
b) 205 − [ 1200 − ( 4 2 − 2.3 ) 3 ]=205-( 1200 − 1000 ) = 5
2345-1000÷[19-2×(21-18)^2]
\(=2345-1000:\left[19-2\cdot9\right]=1345\)
\(2345 − 1000 : [ 19 − 2 × ( 21 − 18 )^2]\)
\(= 2345 − 1000 : ( 19 − 2 × 3^2)\)
\(= 2345 − 1000 : ( 19 − 2 × 9 )\)
\(= 2345 − 1000 : ( 19 − 18 )\)
\(= 2345 − 1000 : 1\)
\(= 2345 − 1000\)
\(= 1345\)
2345-1000÷[19-2×(21-18)^2]
= 2345 - 1000 : ( 19-2x32)
= 2345 - 1000 : ( 19 - 2 x 9)
= 2345 - 1000 : 1
= 23450 - 1000
= 1345
f 2345-1000: [ 19-2(21-18)2]
= 2345- 1000:[19-2.32]
=2345- 1000:[19-2.9]
=2345-1000:[19-18]
=2345-1000:1
=2345-1000=1345
sai đề rồi kìa , phải là 100 chứ ==
2345-1000:[19-2(21-18)2]
.giúp mk tính từg bước
\(2345-1000:\left[19-2\times\left(21-18\right)^2\right]\)
\(=2345-1000:\left[19-2\times3^2\right]\)
\(=2345-1000:\left[19-18\right]\)
\(=2345-1000\)
\(=1345\)
2345-1000:[19-2(21-18)2]
= 2345-1000:(19-2.32)
= 2345-1000:(19-2.9)
= 2345-1000:(19-18)
= 2345-1000:1
= 2345 - 1000
= 1345
2345 - 1000 : [ 19 - 2 (21 -18 )2
= 2345 - 1000 : [ 19 - 2 . 9]
= 2345 - 1000 : [ 19 - 18 ]
= 2345 - 1000 : 1
= 2345 - 1000
= 1345
2345-1000:[19-2(21-18)2]
2345-1000:[19-2(21-18)2]
= 2345 - 1000 : [19-2x32 ]
=2345-1000 : [19 - 2x9]
= 2345 - 1000 : [19 - 18]
= 2345 - 1000 : 1
= 2345 -1000
= 1345
\(2345-1000\div\text{ }\left[19-2\left(21-18\right)^2\right]\)
\(=2345-1000\div\left(19-2.3^2\right)\)
\(=2345-1000\div\left(19-2.9\right)\)
\(=2345-1000\div\left(19-18\right)\)
\(=2345-1000\div1\)
\(=2345-1000\)
\(=1345\)
2345 - 1000 : [ 19 - 2 (21 - 18)2 ]
=2345 - 1000 : ( 19 - 2 x 32 )
=2345 - 1000 : ( 19 - 2 x 9 )
=2345 - 1000 : ( 19 - 18 )
=2345 - 1000 : 1
=2345 - 1000
=1345
Câu 2 : 7 dam = ... hm. Phân số thích hợp điền vào chỗ chấm là: *
A, 7/10
B, 7/100
C. 7/1000
D. 7/10 000
Bài 1: Thực hiện phép tính:
a) 3.52 + 15.22 – 26:2
b) 53.2 – 100 : 4 + 23.5
c) 62 : 9 + 50.2 – 33.3
d) 2345 – 1000 : [19 – 2(21 – 18)2]
e) 128 – [68 + 8(37 – 35)2] : 4
f) 568 – {5[143 – (4 – 1)2] + 10} : 10
e: \(=128-\left[68+8\cdot4\right]:4=128-25=103\)
\(a.3.5^2+15.2^2-26:2\) \(b.5^3.2-100:4+2^3.5\)
\(=75+60-13\) \(=250-25+40\)
\(=135+13=148\) \(=265\)
\(c.6^2:9+50.2-3^3.3\) \(d.2345-1000:\left[19-2.\left(21-18\right)^2\right]\)
\(=4+100-81\) \(=2345-1000:\left[19-2.3^2\right]\)
\(=23\) \(=2345-1000:\left[19-18\right]\)
\(=2345-1000:1\)
\(=2345-1000=1345\)
\(e.128-\left[68+8.\left(37-35\right)^2\right]:4\)
\(=128-\left[68+8.2^2\right]:4\)
\(=128-\left[68+32\right]:4\)
\(=128-100:4\)
\(=128-25=103\)
\(f.568-\left\{5.\left[143-\left(4-1\right)^2\right]+10\right\}:10\)
\(=568-\left\{5.\left[143-3^2\right]+10\right\}:10\)
\(=568-\left\{5.134+10\right\}:10\)
\(=568-\left\{670+10\right\}:10\)
\(=568-680:10\)
\(=568-68=500\)
Thực hiện phép tính:
a) 2010 - 2000 : [486 - 2(72 - 6)]
b) 2345 - 1000 : [19 - 2(21 - 18)2 ]
c) 128 - [68 + 8(37 - 35)2 ] : 4
d) 568 - {5[143 - (4 - 1)2 ] + 10} : 10
a) 2010 - 2000 : [486 - 2(72 - 6)]
= 2010 - 2000 : [486 - 2(49 - 6)]
= 2010 - 2000 : [486 - 2 . 43]
= 2010 - 2000 : [486 - 86]
= 2010 - 2000 : 400
= 2010 - 5
= 2005
b) 2345 - 1000 : [19 - 2(21 - 18)2 ]
= 2345 - 1000 : [19 - 2 . 32 ]
= 2345 - 1000 : [19 - 18]
= 2345 - 1000 : 1
= 2345 - 1000
= 1345
c) 128 - [68 + 8(37 - 35)2 ] : 4
= 128 - [68 + 8 . 22 ] : 4
= 128 - [68 + 32 ] : 4
= 128 - 100 : 4
= 128 - 25
= 103
d) 568 - {5[143 - (4 - 1)2 ] + 10} : 10
= 568 - {5[143 - 9 ] + 10} : 10
= 568 - {5 . 134 + 10 } : 10
= 658 - {670 + 10 } : 10
= 658 - 680 : 10
= 658 - 68
= 590