Tinh nhanh:74 x (-41) + 41 x 24
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41 x 125 - 41 - 41 x 24
= 41 x ( 125 - 1 - 24 )
= 41 x 100
= 4100
41 x 125 - 41 - 41 x 24
= 41 x ( 125 - 24 - 1 )
= 41 x 100
= 4100
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\(\dfrac{24}{12}-\dfrac{41}{13}=\dfrac{180}{156}-\dfrac{41}{13}-\dfrac{12}{24}=\dfrac{592}{312}\)
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Bài 2:
a: =47,4+47,4x4=47,4x5=237
b: =(0,26+0,74)+(0,41+0,59)=1+1=2
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A = 8 . 12 . 32 + 4 . 27 . 24 + 41 .4 . 16
A = 96 . 32 + 96 . 27 + 41 . 4 . 16
A = 96 ( 32 + 27 ) +41 . 4 . 16
A = 96 . 59 + 41 . 64
A = 32 . 3 . 59 + 41 . 32 . 2
A = 32 ( 3 + 59 + 41 + 2 )
A = 32 . 105
A = 3360
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8 x 12 x 32 + 4 x 27 x 24 + 41 x 6 x 16
=96 x 32 + 96 x 27 + 96 x 41
=96 x (32 + 27 + 41)
= 96 x 100
=9600
A = 8 × 12 × 32 + 4 × 27 × 24 + 41 × 6 × 16
A = 8 × 12 × 32 + 4 × 24 × 27 + 6 × 16 × 41
A = 96 × 32 + 96 × 27 + 96 × 41
A = 96 × (32 + 27 + 41)
A = 96 × 100
A = 9600
![](https://rs.olm.vn/images/avt/0.png?1311)
56 x 17 + 56 x 24 +41 x 44
= 56 x ( 17 + 24 ) + 41 x 44
= 56 x 41 + 41 x 44
= ( 56 + 44 ) x 44
= 100 x 44
= 4400
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41*36+59*90+41*84+59*30
=41*36+41*84+59*90+59*30
=41*(36+84)+59*(90+30)
=41*120+59*120
=(41+59)*120
=100*120=12 000
=41x36+41x84+59x90+59x30
=41x(36+84)+59x(90+30)
=41x120+59x120
=120x(41+59)
=120x100
=12000
74 ( − 41 ) − 41.26 = ( 74 + 26 ) ( − 41 ) = 100. ( − 41 ) = − 4100
Lấy 26 ở đâu đấy :)