19 19 years of good friends,

Hand in hand,

3737 is so close,

Let's go together, four, four, six, six.

Make a pair of hands in half.

Look at large numbers, divide them into decimals, make up ten, and add up the remainder. Remember large numbers in your mind and decimals in your hand.

One plus nine, ten tadpoles, two plus eight, ten old ducks, three plus seven, ten old hens, four plus six, ten golden monkeys, five plus five, and ten big tigers.

Application problems of addition and subtraction in first grade mathematics:

1. Students should make 10 lanterns. Eight lanterns have been made. How much more do they have to do?

Six butterflies flew away from the flowers, and five others flew away. How many flew away twice?

There were 15 planes at the airport, and three of them flew away. How many planes are there at the airport now?

Xiaoping planted 7 pots of safflower and the same amount of yellow flowers. How many pots of two kinds of flowers?

The school used to have 5 bottles of glue and bought back 9 bottles. How many bottles are there now?

6. Xiao Qiang has 10 apples. I ate seven apples. How many more are there?

7. There are 13 cars in the passenger station, and three cars have already left. How many cars are there?

8. Children make paper-cuts with 8 pieces of red paper and the same amount of yellow paper. How many sheets of paper did they use?

9. There are 9 horses in the racecourse, and 5 more will come soon. How many horses are there on the racetrack now?

10, the store has 15 fans, and 5 fans have been sold. How many fans are there now?