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\(32\times27+47\times73+27\times15\)
\(=\left(32\times27+27\times15\right)+47\times73\)
\(=27\times\left(32+15\right)+47\times73\)
\(=27\times47+47\times73\)
\(=47\times\left(27+73\right)\)
\(=47\times100\)
\(=4700\)
Học tốt
\(=32\cdot27+27\cdot15+47\cdot73\)
\(=27\cdot\left(32+15\right)+47\cdot73\)
\(=27\cdot47+47\cdot73\)
\(=47\cdot\left(27+73\right)\)
\(=47\cdot100\)
\(=4700\)
72 x 11 = 792
32 x 11 = 352
45 x 11 = 495
61 x 11 = 671
53 x 11 = 583
72 * 11 = 792
32 * 11 = 352
45 * 11 = 495
61 *11 = 671
53 *11 = 583
(145 x 99 + 145 ) - ( 143 x 102 – 143 × 2 ) + 54 x 47 - 47 x 53 - 20 - 27
= 145 × (99 + 1) – 143 × (102 – 2) + 47 × (54 – 53) – (20 + 27)
= 145 × 100 – 143 × 100 + 47 × 1 – 47
= 100 × (145 – 143) + (47 – 47)
= 100 × 2 + 0
= 200
(145 x 99 + 145 ) - ( 143 x 102 – 143 × 2 ) + 54 x 47 - 47 x 53 - 20 - 27
= 145 × (99 + 1) – 143 × (102 – 2) + 47 × (54 – 53) – (20 + 27)
= 145 × 100 – 143 × 100 + 47 × 1 – 47
= 100 × (145 – 143) + (47 – 47)
= 100 × 2 + 0
= 200
(145 x 99 + 145 ) - ( 143 x 102 – 143 × 2 ) + 54 x 47 - 47 x 53 - 20 - 27
= 145 × (99 + 1) – 143 × (102 – 2) + 47 × (54 – 53) – (20 + 27)
= 145 × 100 – 143 × 100 + 47 × 1 – 47
= 100 × (145 – 143) + (47 – 47)
= 100 × 2 + 0
= 200
= 145 x (99+1) - 143 x ( 102-2) + 47 x ( 54 - 53) -20-27
= 145 x 100 - 143 x 100 + 47 x 1 -20-27
= 100 x ( 145 - 143 ) + 47 - 20 - 27
= 200 + 47 - 20 - 27
= 200
A) 145 x (99 + 1) - 143 x (102 - 1)
= 145 x 100 - 143 x 101 = 145 x 100 - 143 x (100 + 1)
= 100 x (145 - 143) - 143
= 200 - 143 = 57
B) 54 x 47 - 47 x 53 - 20 - 27
= 47 x (54 - 53) - (20 + 27)
= 47 x 1 - 47 = 0
a: =17/25(13/19+6/19)=17/25
b: \(=\dfrac{47}{19}\cdot\dfrac{32}{15}-\dfrac{47}{19}\cdot\dfrac{17}{15}=\dfrac{47}{19}\)
\(32\times47+32\times53\)
\(=32\times\left(47+53\right)\)
\(=32\times100\)
\(=3200\)
32 x 47 + 32 x 53
= 32 x ( 47 + 53 )
= 32 x 100
= 3200