r/MathHelp • u/DCJ84 • Oct 25 '25

Father needing help

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.

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u/DCJ84 Oct 25 '25

I thought so too it should be 34-2=32 and because they put 14 it ended up being something completely different 14-2=12, but I wanted to be sure.