a) \(3,54.73+0,23.25+3,54.27+0,17.25\)
\(=3,54.\left(73+27\right)+25.\left(0,23+0,17\right)\)
\(=3,54.100+25.0,4\)
\(=354+10\)
\(=364\)
b) \(12,25:\left(5\frac{9}{20}-4\frac{1}{5}\right)+2,4.3\)
\(=12,25:\left(\frac{109}{20}-\frac{21}{5}\right)+7,2\)
\(=12,25:1,25+7,2\)
\(=9,8+7,2\)
\(=17\)
a,3, 54 x 73 + 0,23 x 25 + 3,54 x 27 + 0,17 x 25
= 3,54 x 73 + 3,54 x 27 + 0,23 x 25 + 0,17 x 25
= 3,54 x(73+27) + 25 x (0,23+0,17)
= 3,54 x 100 + 25 x 0,4
= 3,54 x 100 + 10
= 35,4 x 10 + 10
= 10 x (35,4+1)
= 10 x 36,4
= 364
b,12 , 25 : ( \(5\frac{9}{20}-4\frac{1}{5}\)) + 2 , 4 . 3
= 12 , 25 : ( 109 / 20 - 105 /20 ) + 7 , 2
= 12 , 25 : 1/5 + 7, 2
= \(\frac{1225}{1000}\): \(\frac{3}{2}\) + \(\frac{36}{5}\)
= ( bạn tính nốt nha )
Chúc bạn học tốt !
a) 3,54.73+0,23.25+3,54.27+0,17.25
=3,54.(73+27)+25.(0,23+0,17)
=3,54.100+25.0,4
=354+25.0,4
=354+10
=364
