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\(145,5\cdot5,09-33,5\cdot5,09-12\cdot5,09\)
\(=5,09\cdot\left(145,5-33,5-12\right)\)
\(=5,09\cdot100\)
\(=509\)
145,5*5,09-33,5*5,09-12*5,09
=5,09*(145,5-33,5-12)
=5,09*100
=509
#Trl :
\(145,5\times5,09-5,09\times33,5-12\times5,09\)
\(=5,09\times\left(145,5-33,5-12\right)\)
\(=5,09\times100\)
\(=509\)
a) 45,5 x 21 + 54,5 x 21
= 21 x (45,5 + 54,5)
= 21 x 100
= 2100
b) 145,5 x 5,09 - 33,5 x 5,09 - 12 x 5,09
= 5,09 x (145,5 - 33,5 - 12)
= 5,09 x 100
= 509
a)45,5x21+54,5x21
=21x(45,5+54,5)
=21x100
=2100
b)154,5 x 5,09 - 33,5 x 5,09 -12 x 5,09
=5,09 x(154,5 - 33,5 - 12)
=5,09 x 100
=509
45,5 * 21+54,5 *21=(45,5+54,5)*21=100*21=2100
145,5*5,09-33,5*5,09-12*5,09=(145,5-33,5-12)*5,09=100*5,09=509
a) \(18,5:4,6+14,8:4,6+12,7:4,6\)
\(=\left(18,5+14,8+12,7\right):4,6\)
\(=46:4,6=10\)
b) \(0,75.1,3+0,25.1,3\)
\(=\left(0,75+0,25\right).1,3\)
\(=1.1,3=\dfrac{13}{10}\)
a) \(18,5:4,6+14,8:4,6+12,7:4,6\)
\(=\dfrac{18,5}{4,6}+\dfrac{14,8}{4,6}+\dfrac{12,7}{4,6}\)
\(=\dfrac{1}{4,6}.\left(18,5+14,8+12,7\right)\)
\(=\dfrac{1}{4,6}.46=10\)
b) \(...=1,3.\left(0,75+0,25\right)=1,3.1=1,3\)
c) \(...=0:31,792=0\)
\(0,36\text{×}550+0,18\text{×}126\text{×}2+3\text{×}324\text{×}0,12\)
\(=0,36\text{×}550+0,18\text{×}2\text{×}126+3\text{×}0,12\text{×}324\)
\(=0,36\text{×}550+0,36\text{×}126+0,36\text{×}324\)
\(=0,36\text{×}\left(550+126+324\right)=0,36\text{×}1000=360\)
0,36 x 550 + 0,18 x 126 x2 + 3 x 324 x 0,12
= 0,36 x 550 + 0,36 x 126 + 0,36 x 324
= 0,36 x ( 550 + 126 + 324 )
= 0,36 x 1000
= 360
đúng chưa ?
tích đi
ko tích mét mẹ đó :)))
0,36 * 550 + 0,18 * 126 * 2 + 3 * 324 * 0,12
= 0,36 * 550 + ( 0,18 * 2 ) * 126 + ( 3 * 0,12 ) * 324
= 0,36 * 550 + 0,36 * 126 + 0,36 * 324
= 0,36 x ( 550 + 126 + 324 )
= 0,36 x 1000
= 360