3. Tính giá trị biểu thức:
9900 : 36 – 15 x 11 9700 : 100 + 36 x 12
(15792 : 336) x 5 + 27 x 11 (160 x 5 – 25 x 4) : 4
1036 + 64 x 52 – 1827 215 x 86 + 215 x 14
12 054 : (15 + 67) 53 x 128 - 43 x 128
29 150 - 136 x 201
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9900 : 36 - 15 x 11
= 275 - 165
= 110
9700 : 100 + 36 x 12
= 97 + 432
= 529
( 15792 : 336 ) x 5 + 27 x 11
= 47 x 5 + 297
= 235 + 297
= 532
( 160 x 5 - 25 x 4 ) : 4
= ( 800 - 100 ) : 4
= 700 : 4
= 175
1036 + 64 x 52 - 1827
= 1036 + 3328 - 1827
= 4364 - 1827
= 2537
215 . 869 + 215 . 14
= 215 . ( 869 + 14 )
= 215 . 883
= 189945
a,9900 : 36 -15 . 11
= 275 -15 . 11
=275 - 165
=110
b,(15792 : 336) . 5 +27 . 11
= 47 . 5 + 27 . 11
= 235 + 27.11
= 235 + 297
= 532
nè
1036 + 64 x 52 - 1827
= 1036 + 3328 - 1827
= 4364 - 1827
= 2537
a. \(9900:36-15\cdot11\)
\(=275-15\cdot\left(10+1\right)\)
\(=275-150-15\)
\(=125-15\)
\(=110\)
b. \(\left(15792:336\right)\cdot5+27\cdot11\)
\(=47\cdot5+27\cdot\left(10+1\right)\)
\(=235+270+27\)
\(=532\)
a) (2/5 x 25/29) + (3/5 x 25/29)
= (50/145) + (75/145)
= 125/145
b) (5/2 x 3/7) - (3/14 : 6/7)
= 15/14 - (3/14 x 7/6)
= 15/14 - 1/2
= (30/28) - (14/28)
= 16/28
= 4/7
c) (15/4 : 5/12) - (6/5 : 11/15)
= (15/4 x 12/5) - (6/5 x 15/11)
= 180/20 - 90/55
= 9 - 18/11
= (99/11) - (18/11)
= 81/11
= 7 4/11
a) (2/3) + (20/21 x 3/2 x 7/5)
= 2/3 + (60/210)
= 2/3 + 2/7
= (14/21) + (6/21)
= 20/21
b) (5/17 x 21/32 x 47/24 x 0)
= 0
c) (11/3 x 26/7) - (26/7 x 8/3)
= (286/21) - (208/21)
= 78/21
= 3 9/21
= 3 3/7
a) (25/8) : x = 5/16
=> (25/8) x (16/5) = x
=> 4 = x
b) x + (7/15) = 6/15
=> x = (6/15) - (7/15)
=> x = -1/15
c) x : (28/49) = 7/12
=> x x (49/28) = 7/12
=> x = (7/12) x (28/49)
=> x = 1/2
a) 6 x x = (5/8) : (3/4)
=> 6x = (5/8) x (4/3)
=> 6x = 20/24
=> 6x = 5/6
=> x = (5/6) / 6
=> x = 5/36
câu,b,không,đủ,thông,tin,nhan,bạn.
9900 : 36 - 15 x 11
= 275 - 165
= 110
( 15792 : 336 ) x 5 + 27 x 11
= 47 x 5 + 27 x 11
= 235 + 297
= 532
1036 + 64 x 52 - 1827
= 1036 + 3328 - 1827
= 4364 - 1827
= 2537
12 054 : ( 15 + 67)
= 12 054 : 82
= 147
29150 - 136 x 201
= 29150 - 27 336
= 1 814
9700 : 100 + 36 x 12
= 97 + 432
= 529
( 160 x 5 - 25 x 4 ) : 4
= ( 800 - 100 ) : 4
= 700 : 4
= 175
215 x 86 + 215 x 14
= 215 x ( 86 + 14)
= 215 x 100
= 21 500