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=15,3x(3,4+2,3)+5,7x5,3
=15,3x5,7+5,7x5,3
=5,7x(15,3+5,3)
=5,7x20,6a
=.......
=15,3 x (3,4 + 2,3 ) - 5,7 x 5,3
= 15,3 x 5,7 - 5,7 x 5,3
= 5,7 x ( 15,3 - 5,3 )
= 5,7 x 10
=57
=16,2 x ( 5,7 + 3,7 ) - 6,2 x ( 4,8 + 4,6 ) / ( 13,4 - 0,4 ) + ( 12,3 + 11,2 - 11,5 ) - ( 10,4 + 12,6)
=16,2 x 9,4 - 6,2 x 9,4 / 13 + 12 - 23
=152,28 - 58,28 / 2
= 94/2
=47
\(\frac{5,7\times16,2+16,2\times3,7-6,2\times4,8-6,2\times4,6}{13,4+12,3+11,2-10,4-11,5-12,6-0,4}\)
=\(\frac{16,2\times\left(5,7+3,7\right)-6,2\times\left(4,8+4,6\right)}{\left(13,4-0,4\right)+\left(12,3+11,2-11,5\right)-\left(10,4+12,6\right)}\)
=\(\frac{16,2\times9,4-6,2\times9,4}{13+\left(23,5-11,5\right)-23}\)
=\(\frac{9,4\times\left(16,2-6,2\right)}{13+12-23}\)
=\(\frac{9,4\times10}{2}\)
=\(\frac{94}{2}\)
=47
58*11-5800*0.01-580
=58*11-5800*1/100-58*10
=58*11-58-58*10
=0
58 \(\times\) 11 - 5800 \(\times\) 0,01 - 580
= 58 \(\times\) 11 - 58 - 58 \(\times\) 10
= 58 \(\times\) ( 11 - 1 - 10)
= 58 \(\times\) ( 10 - 10)
= 58 \(\times\) 0
= 0
12.3 + 4 x 12.3 + 12.3 x 5 - 1.23 x 99
= 12.3 + 4 x 12.3 + 12.3 x 5 - 12.3 x 9.9
= 12.3x ( 1 + 4 + 5 - 9.9 )
= 12.3 x 0.1
= 1.23
5.7*16.2+16.2*4.3-6.2*4.8+6.2*5.2=(5.7*16.2+16.2*4.3)-(6.2*4.8+6.2*5.2)=16.2(5.7+4.3)-6.2(4.8+5.2)=16.2*10+6.2*10=10(16.2-6.2)=10
13.4+12.3+11.2+10.4-11.5-12.6-0.4=(13.4+12.3+11.2+10.4)-(11.5+12.6+0.4)=47.3-24.5=22.8
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\(\frac{16,2\cdot3,7+5,7\cdot16,2+7,8+4,8+4,6\cdot7,8}{11,2+12,3+13,4-12,6-11,5-10,4}\)\(=\frac{16,2\cdot(3,7+5,7)-7,8\cdot(4,8+4,6)}{(13,4-12,6)+(12,3-11,5)+(11,2-10,4)}\)
\(=\frac{16,2\cdot9,4-7,8\cdot9,4}{0,8+0,8+0,8}=32,9\)
~Chúc bạn học tốt
Mk ko chắc nữa
ta tach phep tinh do ra lam ahi ve .
ve A la phep tinh 16,2 * 3,7 +5,7 * 16,2
ve B la phep tinh con lai
ve A = 16,2 *9( 3,7 + 5,7 ) = ........
ve B = 7,8 * (4, 8+ 4,6 )=.......
cuoi cung bang ve A + ve B la ra
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