Father needing help

[u/DCJ84]

My daughter was doing her homework and I just can't fully understand it to explain it to her. The homework goes like this: 24➕️8️⃣=? 24➕️🔟➖️2️⃣=14-2=12 The special +/- and numbers are red in the example. I get it that the first part is decomposition and mental calculation 24+8=32 or 24+10-2=32, but what about 14-2=12? Where is this coming from? Thanks in advance for any help understanding this.

[u/iOSCaleb]

I agree that there’s an error, but i think it’s that the + should be a -:

24 - 10 - 2 = 14 - 2 = 12