32 divided by 2 equals 16, so we can start with 16. If children are too difficult to understand, you can teach them this way.

16+ 16=32, the first addend 16 minus 1, and the second addend 16 plus 1, which is still the same, or 32, that is,1.

Similarly (15-2)+(17+2) =13+19 = 32.

( 13+ 10)+( 19- 10)=23+9=32,

Similarly, 25+7=32. . . . . . . . . . . . . And so on, hope to adopt.