Three, seven, three, seven, seven, seven, so close, let's come together four, four, six, six,

50-50% hands, ten friends remember.

Math nursery rhymes of junior students;

A, two digits plus or minus integer ten or digits of oral arithmetic.

Ten plus ten, one plus one,

The digits add up to ten, ten plus one;

Ten MINUS ten, one MINUS one,

There are not enough places, and there are ten places.

Second, the addition formula name memory

Every item in the formula has a name, and everyone writes it down.

Both sides of the plus sign are called addends, and the equal sign is called sum.