1, this topic mainly investigates the conversion between kilograms and grams. First of all, according to the topic, we can know that the weight of a pear is about 320g, and the weight of an apple is about 0.4kg.. Their units are different. First, it is easier to turn their units into unified units and then compare them.

0.4 kg is equal to 400 g, and the weight of pear is 320 g, so if the two are compared, the quality of apple is higher, because 400 g is more than 320 g, or the weight of pear can be converted into kg, and the weight of pear is 320 g, which is equal to 0.32 kg, so 0.32 kg is more than 0.4 kg.

2. Application problems like this usually appear in the third grade of primary school. When you do these questions, you must remember the progress between them. For example, the progressive rate of grams and kilograms is 1000, so if you convert 0.4 kilograms of apples into grams, it is equivalent to 400 grams with 0.4 ×1000,320 grams converted into kilograms.

3. Such questions are relatively simple. Just remember that the ratio between them is easy to calculate. Math must be practiced and written more, and sometimes you have to recite more. Only by practicing the exam more can we work out the application problems. No, the questions can be done repeatedly. Mathematics can be learned well as long as you work hard.

4. Kilograms and grams are also widely used in daily life. For example, you need grams and kilograms when you go shopping, and you also need grams and kilograms when you weigh yourself. Therefore, it is very useful to learn the conversion of quality units in daily life. I hope my answer can help you.

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