100:{250:[325-(50.23- 22 .50)]}
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\(23+50.23+50\)
\(=\left(23+23\right).\left(50+50\right)\)
\(=56.100\)
\(=5600\)
100:(250:(325-(4.53-22.50)))
=100:(250:(52.13-(22.53-23.52)))
=100:(250:(52.13-22.52.(5-2)))
=100:(250:(52.13-52.22.3))
=100:(250:(52.(13-12)))
=100:(250:25)
=100:10
=10
Đúng thì tk nha (bài kia t viết hơi chậm nên để 2 bạn kia làm lun :v)
100.{250:[325-(4.53-22.50)]}
=100.{250:[325-(4.125-4.50)]}
=100.{250:[325-(500-200)]}
=100.{250:[325-300]}
=100.{250:25}
=100.10
=1000
100 . { 250 : [ 325 - ( 4 . 53 - 22 . 50 )]}
= 100 . { 250 : [ 325 - ( 4 . 125 - 4 . 50)]}
= 100 . { 250 : [ 325 - ( 500 - 200 )]}
= 100 . { 250 : [ 325 - 300 ]}
= 100 . { 250 : 25 }
= 100 . 10
= 1000
a) 810 + 50 = 860
350 + 250 = 600
550 - 500 = 50
b) 600 + 60 = 660
105 + 15 = 120
245 - 45 = 200
c) 200 - 100 = 100
250 - 50 = 200
333 - 222 = 111
Tính nhanh: 250 + 550 + 50 + 250 - 100=1000
104 \(\times\) 125
= 13 \(\times\) 8 \(\times\) 125
= 13 \(\times\) (8 \(\times\) 125)
= 13 \(\times\) 1000
= 13 000
b, 22 \(\times\) 45
= 2 \(\times\) 11 \(\times\) 5 \(\times\) 9
= (2 \(\times\) 5) \(\times\) (11 \(\times\) 9)
= 10 \(\times\) 99
= 990
c, 50 \(\times\) 12
= 50 \(\times\) 2 \(\times\) 6
= 100 \(\times\) 6
= 600
d, 250 \(\times\) 16
= 250 \(\times\) 4 \(\times\) 4
= 1000 \(\times\) 4
= 4000
\(d,100:\left\{250:\left[450-\left(4.53-22.25\right)\right]\right\}\)
\(100:\left\{250:\left[450-\left(4.5^3-3^2.25\right)\right]\right\}\)
\(100:\left\{250:\left[450-175\right]\right\}\)
\(100:\left\{250:275\right\}\)
\(=100:\dfrac{10}{7}\)
\(=100.\dfrac{7}{10}\)
\(=70\)
100:{250:[325-(50.2\(^3\)-2\(^2\).50)]}
=100:{250:[325-(50.8-4.50)]}
=100:{250:[325-(400-200)]}
=100:[250:(325-200)
=100:(250:125)
=100:2
=50