Đặt tính rồi tính

76,58 + 9,72 ……… ……… ………

6,71 + 12,9 ……… ……… ………

912,4 – 78,23 ……… ……… ………

83,27 – 19,54 ……… ……… ………

\[\begin{array}{l} \times \,\,\begin{array}{*{20}{c}}{\,\,\,12,96}\\{\underline {\,\,\,\,\,\,\,\,3,4} }\end{array}\\\,\,\,\,\,\,\,5\,\,184\\\,\,\,\underline {38\,\,88\,\,\,} \\\,\,44,064\end{array}\]

\[\begin{array}{l} \times \,\,\begin{array}{*{20}{c}}{\,\,\,\,\,\,\,\,567}\\{\underline {\,\,\,\,\,\,\,\,\,8,9} }\end{array}\\\,\,\,\,\,\,\,\,510\,\,3\\\,\,\,\underline {4\,\,536\,\,\,\,\,} \\\,\,\,5\,\,046,3\end{array}\]

\[\begin{array}{l} \times \,\,\begin{array}{*{20}{c}}{\,\,84,5}\\{\underline {\,0,26} }\end{array}\\\,\,\,\,\,\,5\,\,07\\\,\,\,\underline {16\,\,9\,\,\,\,} \\\,\,21,97\end{array}\]

a) 12,6 + 89,03 + 7,1

= 101,63 + 7,1

= 108,73

b) 8,43 + 91,5 – 17,64

= 99,93 – 17,64

= 82,29

c) 231 – 34,8 – 123,4

= 196,2 – 123,4

= 72,8

d) 192,6 – (34,8 + 21,69)

= 192,6 – 56,49

= 136,11