ủa, ko trả lời mà vô hoại nguoif ta chi
a) = 1,7 x 46 + 1,7 x 60 + 1,7 x 94
= 1,7( 46 + 60 + 94 )
= 1,7 x 200 = 340
b) 202,1 x 3,6 +202,1 x6,3 +2021 : 100
= 202,1 x 3,6 + 202,1 x 6,3 + 20,1
= 202,1 x ( 3,6 + 6,3 + 0,1 )
= 202,1 x 10
=2021
c)20,21 x 48 + 20,21 x 51 + 2021 : 100
= 20,21 x 48 + 20,21 x51 + 20,21
= 20,21 (48+51+1)
= 2021
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a \(1,7\times46+3,4\times30+3,4\times47\)
\(=1,7\times2\times23+3,4\times30+3,4\times47\)
\(=3,4\times23+3,4\times30+3,4\times47\)
\(=3,4\times\left(23+30+47\right)=3,4\times100=34\)
b \(202,1\times3,6+202,1\times6,3+2021:100\)
\(=202,1\times3,6+202,1\times6,3+2021:10\times\frac{1}{10}\)
\(=202,1\times3,6+202,1\times6,3+202,1\times\frac{1}{10}\)
\(=202,1\times\left(3,6+6,3+\frac{1}{10}\right)=202,1\times10=2021\)
c \(20,21\times48+20,21\times51+2021:100\)
\(=20,21\times48+20,21\times51+20,21\)
\(=20,21\times\left(48+51+1\right)=20,21\times100=2021\)
