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$\text{Bài 2. Tính:}$

`a. 33,76 + 19,52 + 6,24`

`= ( 33,76 + 6,24 ) + 19,52`

`= 40 + 19,52`

`= 59,52.`

`b. ( 27,09 + 258,91 ) × 25,4`

`= 286 × 25,4`

`= 7264,4.`

`c. 31,5 × 2,6 + 39,72`

`= 81,9 + 39,72`

`= 121,62.`

`d. ( 128,4 - 73,2 ) : 2,4 + 18,32`

`= 55,2 : 2,4 + 18,32`

`= 23 + 18,32`

`= 41,32.`

`e. 38,4 + 13,05 : 1,5 - 25,17`

`= 38,4 + 8,7 - 25,17`

`= 47,1 - 25,17`

`= 21,93.`

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