For children struggling with addition with carrying. First, how far back should we go?

In first-grade math, I believe many classes are working on addition with carrying at this time of year.Problems like "8+5" or ...

Before buying expensive teaching materials: 5 items from the 100-yen shop to start lower-grade math play | What a math teacher does at home

When it comes to lower-grade math, the thing parents are most tempted to spend money on is "teaching materials." Educational ...