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4,68+6,03+3,97 = 4,68 + (6,03+3,97) = 4,68 + 10 = 14,68
4,2+3,5+4,5+6,8 = (4,2+6,8)+(3,5+4,5) = 11 + 8 = 19
k mk nha
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= (0,25 x 4) x (1,25 x 8) x (2,3 x 11)
= 1 x 10 x 25,3
= 253
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3,5 x 10,1
=3,5 x (10+0,1)
=3,5x10 + 3,5x0,1
=35 +0,35
=35,35
3,5 x 10,1
= 3,5 x { 10 + 0,1 }
= 3,5 x 0,1 + 3 ,5 x 10
= 0,35 + 35
=35,35
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26,3 + 26,3 x 98 + 26,3
= 26,3 x 2 + 26,3 x 98
= 26,3 x (98 + 2)
= 26,3 x 100
=2630
Chúc bạn hk tốt ~
26,3 + 26,3 x 98 + 26,3
= 26,5 x (1+ 98 + 1)
= 26,5 x 100
= 2650
`HT`
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\(\frac{9x56x49}{7x8x63}\)
= 9 x 7 x 7/ 7 x 8 x 63
=\(\frac{1x7x7}{1x1x63}\)
\(=\frac{49}{63}\)
\(=\frac{7}{9}\)
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35,9 x (1000 : 8) + 35,9 x 876 - 35,9
= 35,9 x 125 + 35,9 x 876 - 35,9
= 35,9 x ( 125 + 876 - 1)
= 35,9 x 1000
= 35900
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a , \(6,7\times3,2+\frac{67}{10}\times6,8\)
\(=6,7\times3,2+6,7\times6,8\)
\(=6,7\times\left(3,2+6,8\right)\)
\(=6,7\times10\)
\(=10\)
b , \(68,4\div0,2+68,4\div0,25+68,4\)
\(=68,4\times5+68,4\times4+68,4\times1\)
\(=68,4\times\left(5+4+1\right)\)
\(=68,4\times10\)
\(=684\)
\(a.6,7\times3,2+\frac{67}{10}\times6,8\)
\(=6,7\times3,2+6,7\times6,8\)
\(=6,7\times(3,2+6,8)\)
\(=6,7\times10\)
\(=67\)
\(b.68,4\div0,2+68,4\div0,25+68,4\)
\(=68,4\times5+68,4\times4+68,4\)
\(=68,4\times(5+4+1)\)
\(=68,4\times10\)
\(=684\)
học tốt