Question

Покажите все типы умножение для третей класса

Answer 1

Свойства  умножения
1) a*b = b*a -  переместительное свойство умножения
2) a*(b+c) = a*b + a*c - распределительное свойство умножения для суммы
3) a*(b-c)  = a*b - a*c - распределительное свойство умножения для разности
4)  a*(b*c) = (a*b)*c - сочетательное свойство - от перестановки множителей результат не изменяется.
5) a* 1 = a - при умножении на 1 - результат не изменяется - остается прежним.
6) a* 0 = 0 - при умножении на 0 -  результат всегда равен 0.
Правило умножения на 10 -  приписать справа ОДИН ноль к числу
2*10 = 2 0 

Answer 2

Types of Multiplication for Third Grade

In third grade, students are introduced to different types of multiplication. Here are some of the types of multiplication that are typically taught at this grade level:

1. Repeated Addition: This is the most basic form of multiplication, where students understand that multiplication is a shortcut for repeated addition. For example, to find the product of 3 multiplied by 4, students can add 3 four times: 3 + 3 + 3 + 3 = 12.

2. Arrays: Arrays are a visual representation of multiplication. Students learn to arrange objects or numbers in rows and columns to understand multiplication. For example, to find the product of 3 multiplied by 4, students can arrange 3 rows with 4 objects in each row, resulting in a total of 12 objects.

3. Number Lines: Number lines are used to help students understand multiplication as jumps on a number line. For example, to find the product of 3 multiplied by 4, students can start at 0 and make 3 jumps of size 4: 0, 4, 8, 12.

4. Skip Counting: Skip counting is a method where students count by a specific number to find the product. For example, to find the product of 3 multiplied by 4, students can skip count by 3: 3, 6, 9, 12.

5. Multiplication Tables: Students are introduced to multiplication tables, which are grids that show the products of numbers from 1 to 10. Memorizing multiplication tables helps students quickly recall multiplication facts.

These are some of the types of multiplication that are typically taught in third grade. It's important to note that different curricula and educational systems may have variations in the specific methods used to teach multiplication.