Cultivating children's interest and ability in mathematics is a long-term process, which requires the joint efforts of parents and teachers. Here are some suggestions:

1. Create a positive learning environment: provide children with a quiet and tidy learning space so that they can concentrate on math learning. At the same time, encourage them to ask questions, think and solve problems, and cultivate their exploration spirit and self-confidence.

2. Use games and real life situations: connect mathematics with real life through math games, puzzles and toys. Let the children learn math while playing. For example, let children participate in cooking, shopping and other activities, and let children calculate the quantity and price of ingredients.

3. Diversified teaching methods: adopt a variety of teaching methods, such as stories, charts and experiments. To stimulate children's interest in learning. At the same time, according to children's interests and abilities, flexibly adjust the teaching content and difficulty, so that they can gradually improve.

4. Cultivate mathematical thinking: encourage children to think logically and solve problems, and cultivate children's mathematical thinking ability. You can stimulate children's thinking vitality and creativity by solving puzzles and math competitions.

5. Establish good study habits: cultivate children's good study habits, such as completing homework on time and reviewing classroom content. At the same time, encourage them to study independently and cultivate their learning ability and self-discipline ability.

6. Give positive encouragement and rewards: Give children positive encouragement and rewards in time so that they can feel the fruits and fun of mathematics learning. This can enhance their interest and motivation in mathematics.

In short, cultivating children's interest and ability in mathematics requires the patience and attention of parents and teachers. By creating a positive learning environment, using games and real life situations, diversifying teaching methods, cultivating mathematical thinking, establishing good study habits and giving positive encouragement and rewards, children's interest and ability in mathematics can be gradually cultivated.