Unit 1 · Class 6 IB MYP · Formula Sheet
Number Operations Formulas — Class 6 IB MYP
Build fluency with the four operations on whole numbers and explore order of operations.
Key Formulas
Order of Operations
\text{BODMAS: Brackets, Orders, Division, Multiplication, Addition, Subtraction}
Commutative (Addition)
a + b = b + a
Commutative (Multiplication)
a \times b = b \times a
Associative (Addition)
(a + b) + c = a + (b + c)
Distributive
a(b + c) = ab + ac
Identity Elements
a + 0 = a, \quad a \times 1 = a
Worked Examples
1Using: Place Value
Find the place value of 6 in 3,65,421.
Step 1: 6 is in the ten-thousands place.
Step 2: Place value = 6 x 10,000 = 60,000.
Answer: 60,000
2Using: Successor
Find the successor of 9,999.
Step 1: Successor = n + 1
Step 2: = 9,999 + 1 = 10,000.
Answer: 10,000
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