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58 x 42 + 32 x 8 + 5 x 16
= 58 x 42 + 16 x 2 x 8 + 5 x 16
= 58 x 42 + 16 x ( 2 x 8 + 5 )
= 58 x 42 + 16 x 21
= 58 x 2 x21 + 16 x 21
= 21 x ( 58 x 2 + 16 )
= 21 x 132
= 2772
![](https://rs.olm.vn/images/avt/0.png?1311)
58 x 42 + 32 x 8 + 5 x 16
= 58 x 42 + 2 x 16 x 8 + 5 x 16
= 58 x 21 x 2 + 16 x ( 2 x 8 + 5 )
= 58 x 21 x 2 + 16 x 21
= 21 x ( 58 x 2 + 16 )
= 21 x ( 116 + 16 )
= 21 x 132
= 2772
\(58\times42+32\times8+5\times16\)
\(=16\times16+5\times16+58\times42\)
\(=16\times\left(16+5\right)+58\times42\)
\(=16\times21+58\times42\)
\(=16\times21+116\times21\)
\(=\left(16+116\right)\times21\)
\(=132\times21\)\(=2772\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 58 x 42 + 32 x 8 + 5 x 16
= 58 x 42 + 16 x 2 x 8 + 5 x 16
= 58 x 42 + 16 x 16 + 5 x 16
= 58 x 42 + 16 x ( 16 + 5 )
= 58 x 42 + 16 x 21
= 58 x 42 + 8 x 42
= 42 x ( 58 + 8 )
= 42 x 66
= 2772
a) ( 2 x 2 ) x 21x29 + 4 x( 8 x 8 )+ (5 x 4) x 4
= 4 x 609 + 4 x 64+20x4
=4x(609+64+20)
=4x693
=2772
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(100+42) x42+(200-58)x58
=142x42+142x58
=142x(42+58)
=142x100
=14200
\(\left(100+42\right)\times42+\left(200-58\right)\times58\)
\(=142\times42+142\times58\)
\(=142\times\left(42+58\right)\)
\(=142\times100=14200\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 1,75 : 0,25 + 1,75 : 0,5 + 1,75 : 0,25
= 1, 75 : \(\dfrac{1}{4}\) + 1,75 : \(\dfrac{1}{2}\) + 1,75 : \(\dfrac{1}{4}\)
= 1,75 x 4 + 1,75 x 2 + 1,75 x 4
= 1,75 x (4 + 2 + 4)
= 1,75 x 10
= 17,5
b) 26,3 x 101 - 26 - 0,3
= 26,3 x 101 - (26 + 0,3)
= 26,3 x 101 - 26,3 x 1
= 26,3 x (101 - 1)
= 26,3 x 100
= 2630
c) (200 - 58) x 42 + (100 + 42) x 58
= 142 x 42 + 142 x 58
= 142 x (42 + 58)
= 142 x 100
= 14200
![](https://rs.olm.vn/images/avt/0.png?1311)
58 x 42 + 32 x 8 + 5 x 16
= 116 x 21 + 16 x 16 + 5 x 16
= 116 x 21 + 16(16 + 5)
= 116 x 21 + 16 x 21
= 21 x ( 116 + 16 )
= 21x 132
= 2772
58*42+32*8+5*16
=58*42+2*16*8+5*16
=58*21*2+16*(2*8+5)
=58*21*2+16*21
=21*(58*2+16)
=21*(116+16)
=21*132
=2772
58x42+32x58+74x42
= 58x ( 42+ 32 ) + 74 x 42
=58 x 74 + 74 x 42
= 74 x ( 58+ 42)
=74 x 100
=7 400
58.(42+32)+74.42=58.74+74.42=74.(58+42)=74.100=7400