Primary 3 - Math
Chapter 2: Multiplication, Division & Operations
Essential Multiplication Facts: Mastering Tables 2, 3, 4, 5, 10 & Number Patterns
Click any sentence to listen 👆
In this engaging mental math lesson, we master the fundamental multiplication tables: 2, 3, 4, 5, and 10. We uncover numerical patterns: table 2 doubles numbers, table 5 always ends in 0 or 5, table 10 shifts place value with a zero in the ones place, and table 4 is simply doubling table 2 facts.
🔢 Essential Table Patterns
Table of 2 (Doubles)
Skip count by 2s; all products are even.
2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Table of 5 (Nickel Rule)
Ones digit is always either 0 or 5.
5, 10, 15, 20, 25, 30, 35, 40, 45, 50
Table of 10 (Dime Rule)
Append a zero to the factor's right.
10, 20, 30, 40, 50, 60, 70, 80, 90, 100
💡 The 'Double-Double' Strategy for 4
Because 4 = 2 × 2, multiplying by 4 means doubling twice:
Example: What is 4 × 6?
• First double: 2 × 6 = 12.
• Second double: 12 + 12 = 24!
Therefore: 4 × 6 = 24.
• First double: 2 × 6 = 12.
• Second double: 12 + 12 = 24!
Therefore: 4 × 6 = 24.
Mental Computation Practice
Answer: Skip count by 5s eight times: 5, 10, 15, 20, 25, 30, 35, 40. So 5 × 8 = 40.
Answer: 10 × 7 = 70.
Answer: 4 × 3 = 12 students.
Tap any card to reveal its meaning, or tap the audio icon to listen:
skip counting
Tap to reveal definition 👆
عد قفزي بمقدار ثابت
📖 Def: counting forwards by a number greater than 1
multiple
Tap to reveal definition 👆
مضاعف ناتج عن الضرب
📖 Def: product of a number and any integer
double
Tap to reveal definition 👆
مضاعف ومضروب في 2
📖 Def: twice as much or as many
pattern
Tap to reveal definition 👆
نمط رياضي منتظم
📖 Def: regular repeated arrangement or sequence
ones digit
Tap to reveal definition 👆
رقم خانة الآحاد
📖 Def: digit in the units place
tens digit
Tap to reveal definition 👆
رقم خانة العشرات
📖 Def: digit in the tens place
mental math
Tap to reveal definition 👆
حساب ذهني بالعقل
📖 Def: calculations performed in the mind
strategy
Tap to reveal definition 👆
استراتيجية وطريقة حل
📖 Def: plan of action to solve problem
even number
Tap to reveal definition 👆
عدد زوجي يقبل القسمة على 2
📖 Def: integer divisible by 2
append
Tap to reveal definition 👆
يضيف صفراً لليمين
📖 Def: add to the end
fluency
Tap to reveal definition 👆
طلاقة وسرعة في الحساب
📖 Def: ability to calculate smoothly and accurately
sequence
Tap to reveal definition 👆
متتالية أعداد منتظمة
📖 Def: particular order in which numbers follow
Click on an option to check your answer and view the detailed explanation:
1
2
3
4
5
6
7
8
🎉 Congratulations! You have completed all lesson stations successfully!