Question

[Phudaikl123]

a)6,5+1,2+3,5-5,2+6,5-4,8

b) (-4,3×1,1+1,1×4,5):(-0,5:0,05+ 10,01)

c) (6,7+5,66-3,7+4,34)×(-76,6×1,2+7,66×12)

Answer 1

[Vũ Minh Tuấn]

a) \(6,5+1,2+3,5-5,2+6,5-4,8\)

\(=6,5+1,2+3,5+6,5-5,2-4,8\)

\(=\left(6,5+3,5+6,5\right)+1,2-\left(5,2+4,8\right)\)

\(=16,5+1,2-10\)

\(=17,7-10\)

\(=7,7.\)

b) \(\left(-4,3.1,1+1,1.4,5\right):\left(-0,5:0,05+10,01\right)\)

\(=\left\{1,1.\left[\left(-4,3\right)+4,5\right]\right\}:\left[\left(-10\right)+10,01\right]\)

\(=\left(1,1.0,2\right):0,01\)

\(=0,22:0,01\)

\(=22.\)

c) \(\left(6,7+5,66-3,7+4,34\right).\left(-76,6.1,2+7,66.12\right)\)

\(=\left[\left(5,66+4,34\right)+\left(6,7-3,7\right)\right].\left[7,66.\left(-10\right).1,2+7,66.12\right]\)

\(=\left[10+3\right].\left[7,66.\left(-12\right)+7,66.12\right]\)

\(=13.\left\{7,66.\left[\left(-12\right)+12\right]\right\}\)

\(=13.0\)

\(=0.\)

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