Khan Maths: Grade 3

multiplication

phép nhân

addition

phép cộng

subtraction

phép trừ

equal groups

các nhóm bằng nhau

What are equal groups?

Groups that have the exact same number of objects inside.

repeated addition

phép cộng lặp lại

What is repeated addition?

Adding the same number many times to find a total.

number line

trục số

array

mảng/ sơ đồ hình chữ nhật

What is an array?

A set of objects arranged in organized rows and columns.

commutative property

tính chất giao hoán

What does the commutative property say?

The rule that says the order of numbers in multiplication does not change the answer.

1-digit multiplication

phép nhân với số có 1 chữ số

distributive property

tính chất phân phối

What is distributive property?

Breaking a multiplication problem into two smaller, easier parts to find the total.

factors

thừa số

What are factors?

The numbers you multiply together to get a result.

A gardener has 15 flowers. She plants them in 3 equal rows. How many flowers are in each row?

5

A store has 18 toys. They put the toys into 3 equal boxes. How many toys are in each box?

6

rounding

làm tròn

estamation

ước lượng

breaking apart

tách số

regrouping

nhóm lại/ mượn - nhớ

missing number

số còn thiếu

What will we do when breaking a number apart?

We'll split a 3-digit number into smaller parts (like hundreds, tens, and ones) to add or subtract easily

What will we do when regrouping?

We move a value from one place value column to another (like carrying 10 ones to the tens place)

Lan has 37 stickers. She wants to round this number to the nearest 10. What is the rounded number?

40

A bakery sells 156 cookies in the morning and 78 cookies in the afternoon. How many cookies did they sell in total?

234

A farmer has 425 watermelons. He sells 158 of them. How many watermelons does he have left?

267

division

phép chia

fact family

gia đình phép tính

What is a fact family?

A group of related multiplication and division facts using the same three numbers (e.g., 3, 6, and 18)

dividend

số bị chia

divisor

số chia

quotient

thương

What is a quotient?

The answer to a division problem.

A teacher has 20 desks. She arranges them into 4 equal rows. How many desks are in each row?

5

fraction

phân số

unit fraction

phân số đơn vị

What is an unit fraction?

A fraction that represents exactly one part of a whole, where the top number is always 1 (like 1/4)

numerator

tử số

denominator

mẫu số

fractions on the number line

phân số trên trục số

whole numbers as fractions

số nguyên dưới dạng phân số

An has a chocolate bar. He breaks it into 6 equal parts. He gives 1 part to his friend. What fraction of the chocolate bar did the friend get?

1/6

comparing fractions

so sánh phân số

What is comparing fractions?

Looking at two fractions to see which one is greater than (>), less than (<), or equal to (=) the other.

equivalent fractions

phân số tương đương

What are equivalent fractions?

Different fractions that represent the same value or amount, such as 1/2 and 2/4.

fraction models

mô hình phân số

same denominator

cùng mẫu số

same numerator

cùng tử số

wholes

các đơn vị/ tập hợp

How do you compare fractions with the same denominator?

You only need to look at the numerator.

How do you compare fractions with the same numerator?

You must look at the denominator

associative property of multiplication

tính chất kết hợp của phép nhân

What is the associative property of multiplication?

The rule that you can change how you group numbers when multiplying without changing the total

multiplying by tens

nhân với các số tròn chục

A delivery truck carries 3 crates. Each crate has 2 boxes, and each box contains 5 soccer balls. How many soccer balls are there in total?

30

2-step expressions

biểu thức 2 bước

What is a 2-step expression?

A math problem that requires two different steps or operations to solve.

arithmetic patterns

các quy luật số học

even and odd patterns

quy luật số chẵn và số lẻ

patterns in multiplication tables

quy luật trong bảng cửu chương

2-step estimation

ước lượng 2 bước

Minh has 24 stickers. He gives 6 stickers to his sister. Then, he puts the remaining stickers into 3 equal rows. How many stickers are in each row?

6

What is the missing number in this pattern? 7, 14, 21, ___, 35?

28

What are arithmetic patterns?

They are sequences of numbers that follow a specific rule.

If you add two odd numbers together (like 3 + 5), will the sum be even or odd?

The sum will be an even number.