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k) 4 x 113 x 25 - 5 x 112 x 20
= (4 x 25) x 113 - (5 x 20) x 112
= 100 x 113 - 100 x 112
= 100 x (113 - 112)
= 100
p) 1235 x 6789 x (630 - 315 x 2) : 1996
= 1235 x 6789 x (630 - 630) : 1996
= 1235 x 6789 x 0 : 1996
= 0
l) 54 x 113 + 45 x 113 + 113
= 113 (54 + 45 + 1)
= 113 x 100
= 11300
u) (500 x 9 - 250 x 18) x (1 + 2 + 3 + ... + 9)
= (2 x 250 x 9 - 250 x 2 x 9) x (1 +2 + 3 + ... + 9)
= 0 x (1 + 2 + 3 + ... + 9)
= 0
Bài 1:
a: \(=\dfrac{21}{7}\cdot\dfrac{15}{45}\cdot\dfrac{9}{18}=3\cdot\dfrac{1}{3}\cdot\dfrac{1}{2}=\dfrac{1}{2}\)
b: \(=\dfrac{11}{33}\cdot\dfrac{24}{8\cdot12}\cdot\dfrac{27}{9}=\dfrac{24}{96}=\dfrac{1}{4}\)
Câu 1:
A = (a x 7 + a x 8 - a x 15) : (1 + 2 + 3 + ........ + 10)
A = a x(7+8-15) : (1+2+3+...+10)
A = a x 0 : (1+2+3+...+10)
A = 0: (1+2+3+4+...+10)
A = 0
Câu 2:
B = (18 - 9 x 2) x (2 + 4 + 6 + 8 + 10)
B = (18 - 18) x (2+4+6+8+10)
B = 0 x ( 2 + 4 + 6 + 8 +10)
B = 0
Giáng sinh vui vẻ nhé !
A = {a x (7 + 8 - 15 ) }: (1+2+3+4+........+10)
= {a x 0 } : (1+2+3+4+........+10)
= 0 : (1+2+3+4+........+10)
= 0
đây câu A đây
a) ( 72 - 8x9 ) : ( 20 + 21 + 22 + 23 + 24 + 25 )
= ( 72 - 72 ) : ( 20 + 21 + 22 + 23 + 24 + 25 )
= 0 : ( 20 + 21 + 22 + 23 + 24 + 25 )
= 0
b) ( 500 x 9 - 250 x 18 ) x ( 1 + 2 + 3 + ... + 9 )
= ( 250 x 2 x 9 - 250 x 18 ) x ( 1 + 2 + 3 + ... + 9 )
= ( 250 x 18 - 250 x 18 ) x ( 1 + 2 + 3 + ... + 9 )
= 0 x ( 1 + 2 + 3 + ... + 9 )
= 0
c ) ( 11 + 13 + 15 + ... + 19 ) x ( 6 x 8 - 48 )
= ( 11 + 13 + 15 + ... + 19 ) x ( 48 - 48 )
= ( 11 + 13 + 15 + ... + 19 ) x 0
= 0
a) ( 72 - 8x9 ) : ( 20 + 21 + 22 + 23 + 24 + 25 )
= ( 72 - 72 ) : ( 20 + 21 + 22 + 23 + 24 + 25 )
= 0 : ( 20 + 21 + 22 + 23 + 24 + 25 )
= 0
( 1 + 9 ) x ( 500 x 105 )
= 10 x ( 500 x 105 )
= 10 x 500 x 105
= 5000 x ( 100 + 5 )
= 5000 x 100 + 5000 x 5
= 500000 + 25000
= 525000
( 1 + 9 ) x ( 500 x 105 ) = 10 x ( 500 x 105 )
= 10 x 500 x 105
= 5000 x ( 100 + 5 )
= 5000 x 100 + 5000 x 5
= 500000 + 25000
= 525000
18 x 123 + 9 x 4567 x 2 + 3 x 5310 x 6
= 18 x 123 + 9 x 2 x 4567 + 3 x 6 x 5310
= 18 x 123 + 18 x 4567 + 18 x 5310
= 18 x ( 123 + 4567 + 5310 )
= 18 x 10000
= 180000
500x6+500x4-108:12:9
=500x(6+4)-9:9
=500x10-1
=5000-1
=4999
9782x35-9782x25+1000:5:2
=9782x(35-25)+200:2
=9782x10+100
=97820+100
=97920
37800:25:4+57+467x43
=1512:4+57+20081
=378+57+20081
=435+20081
=20516
(500 x 9 - 250 x 18) x (1 + 2 + 3 + ... + 9)
= (250 x 2 x 9 - 250 x 18) x (1 + 2 + 3 + ... + 9)
= (250 x 18 - 250 x 18) x (1 + 2 + 3 + .. + 9)
= 0 x (1 + 2 + 3 +... +9)
= 0
= ( 500 × 9 - 250 × 2 ×9 ) × ( 1 + 9 ) × 9 : 2
= (500 × 9 - 500 ×9 ) × 45
= 0 × 45
0