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8 x 75 x 3 + 6 x 25 x 4 - 240
___________________________
15 x 2 x 6 + 18 x 16 x5
= 24 x 75 + 24 x 25 - 240 x 10
_________________________
3 x 5 x 2 x 6 + 3 x 6 x 2 x 8 x5
= 24 x (75 + 24 -10)
_________________
3x5x2x6x ( 1+8)
= 24 x 9 x 10 4
_________= ___
18 x 10 x 9 3
https://hoc24.vn/cau-hoi/8-x-75-x-3-6-x-25-x-4-240-15-x-2-x-6-18-x-16-x5tinh-nhanh.5861050326868
![](https://rs.olm.vn/images/avt/0.png?1311)
8 x 75 x 3 + 6 x 25 x 4 - 240
___________________________
15 x 2 x 6 + 18 x 16 x5
= 24 x 75 + 24 x 25 - 240 x 10
_________________________
3 x 5 x 2 x 6 + 3 x 6 x 2 x 8 x5
= 24 x (75 + 24 -10)
_________________
3x5x2x6x ( 1+8)
= 24 x 9 x 10 4
_________= ___
18 x 10 x 9 3
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(=\left(\dfrac{3}{4}+\dfrac{1}{4}\right)+\left(\dfrac{18}{21}+\dfrac{3}{21}\right)+\dfrac{19}{32}+\dfrac{13}{32}=1+1+1=3\)
b: \(=35\cdot1.1\cdot25\cdot\left(7,5-7,5\right)=0\)
![](https://rs.olm.vn/images/avt/0.png?1311)
= 25 x 75/100 + 75 x 0.92 + 25 x 0.25 + 75 x 8/100
= 25 x 0.75 + 75 x 0.92 + 25 x 0.25 + 75 x 0.08
= 25 x ( 0.75 + 0.25 ) + 75 x ( 0.92 + 0.08 )
= 25 x 1 + 75 x 1
= ( 25 + 75 ) x 1
= 100 x 1
= 100
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\(25.24+25.48+75.16+75.56\)
\(=25.\left(24+48\right)+75.\left(16+56\right)\)
\(=25.72+75.72\)
\(=\left(25+75\right).72\)
\(=100.72\)
\(=7200\)
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25 x 14 + 25 x 32 + 46 x 75
= 25 x 14 + 25 x 32 + 46 x 25 x 3
= 25 x 14 + 25 x 32 + 25 x 138
= 25 x ( 14 + 32 + 138 )
= 25 x 184
= 4600.
# Học tốt #
25 x 14 + 25 x 32 + 46 x 75
= 25 x 14 + 25 x 32 + 46 x 25 x 3
= 25 x 14 + 25 x 32 + 25 x 183
= 25 x ( 14 + 32 + 138 )
= 25 x 184
= 4600.
Hok tốt
các bạn ơi gúp mình với
25 x 75 x 18
=1875 x 18
= 33 750