Help to solve a problem. Dad bought 12 lottery tickets, the grandfather is 5 tickets less, than dad, and mom of 8 tickets. How many tickets did they buy? write down the solution of a task of actions in different ways.

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1) 12-5=7 (tickets) - the grandfather 2) 12+7=19 (tickets) - dad and the grandfather 3) 19+8=27 (tickets) of Answer: 27 tickets bought only. 1) 12-5=7 (tickets) - were bought by the grandfather. 2) 12+7+8=27 (tickets) - bought only. Answer: 27
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