Đ, S?

a)  $\begin{array}{l}+\begin{array}{c}6,5\\ \underset{¯}{2,7}\end{array}\\ 8,2\mathrm{......}\end{array}$

b) $\begin{array}{l}+\begin{array}{c}6,56\\ \underset{¯}{5,8}\end{array}\\ 12,36\mathrm{......}\end{array}$

c) $\begin{array}{l}+\begin{array}{c}7,28\\ \underset{¯}{13,5}\end{array}\\ 86,3\mathrm{......}\end{array}$

a) 7,6 + 8,9

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b) 6,45 + 9,27

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c) 5,68 + 8,4

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d) 25,6 + 9, 43

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8 + 4,56 + 5,44 = .................................

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6,9 + 0,85 + 3,1 = .................................

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a) 8,572 + 7,345

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b) 18,69 + 9,703

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c) 7,58 + 6

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d) 63 + 4,2

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