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53 x 4 x 3 x 25 = 53 x ( 4 x 25 ) x 3
= 53 x 100 x 3
= 15900
327 x 73 + 27 x 327 = 327 x ( 73 + 27 )
= 327 x 100
= 32700
Hok Tốt nhen
a) \(52\times4\times3\times25\)
\(=\left(52\times3\right)\times\left(4\times25\right)\)
\(=156\times100\)
\(=15600\)
b) \(327\times73+27\times327\)
\(=327\left(73+27\right)\)
\(=327\times100\)
\(=32700\)
A = \(\dfrac{27}{512}\) \(\times\) \(\dfrac{327}{213}\) \(\times\) \(\dfrac{512}{57}\) \(\times\) \(\dfrac{213}{54}\) \(\times\) \(\dfrac{57}{327}\)
A = \(\dfrac{27\times327\times512\times213\times57}{54\times327\times512\times213\times57}\)
A = \(\dfrac{27}{54}\)
A = \(\dfrac{1}{2}\)
a.245 x ( 327-18-9) = 245 x 300 = 73500
b. (462 - 62) x 4 = 1600
c. 900 : 9 = 100
d. (12+20) : 4 = 8
245x327-245x18-9x245 462 x 4 - 62 x 4
=245x(327-18-9) = ( 462 - 62) x 4
=245x300 = 400 x 4
=73500 = 1600
35 : 7 - 21 : 7 ( 25 x 36 ) : 9
= ( 35 - 21) : 7 = 900 : 9
= 14 : 7 = 100
= 2
12 : 4 + 20 : 4
= ( 12 + 20 ) : 4
= 32 : 4
= 8
36 x 532 + 64 x 532
=(36+64)x532
= 100x532
=53 200
245 x 327 - 245 x 26 - 245
=245x327-245x26-245x1
=245x(327-26-1)
=245x300
=73 500
\(108\times5+108\times96-108=108\times\left(5+96-1\right)\)
\(=108\times100=10800\)
a) 327 x 15 + 327 x 85
= 327 x (15+85)
= 327 x 100
= 32700
b) 405 x 250 + 750 x 405
= 405 x (250+750)
= 405 x 1000
- 405000
25 x 12 x 30 x 4 = (25 x 4) x (12 x 30)
= 100 x 360
= 36000
25 x 12 x 30 x 4 = ( 25 x 4 x 10 ) x 12 x 3
= 1000 x 36
= 36 000
(505+495)+(327+673)
=1000+1000
=2000
\(327 + 495+673+505 = (327+673)+(495+505) = 1000+1000 = 2000\)