Whole Numbers - Operations

Examples, solutions, videos, and lessons on arithmetic operations with whole numbers, as taught in Singapore Math.

Singapore Maths: Primary 5 - Multiplying Whole Numbers by 10s, 100s and 1000s

How to multiply whole numbers by 10s, 100s and 1000s. Example of how to estimate product of two or more whole numbers by simplifying them to the nearest 10s, 100s and 1000s.

Singapore Maths: Primary 5 - Dividing Whole Numbers by 10s, 100s and 1000s

Dividing whole numbers by tens, hundreds and thousands, and estimating the division of two or more whole numbers by simplifying them to the nearest 10s, 100s and 1000s.

Singapore Math: Primary 5 - Operations on Whole Numbers, Order of Operations

Learn the correct order of operations (addition, subtraction, multiplication and division)

Check out our most popular games!

Fraction Concoction Game:
Master fractions in the lab: mix, add, and subtract beakers to create the perfect concoction!

Fact Family Game:
Complete fact families and master the link between addition & subtraction and multiplication & division.

Number Bond Garden:
Clear the board by matching number pairs that sum to ten in this garden-themed mental math puzzle.

Online Addition Subtraction Game:
Practice your addition and subtraction skills to help the penguin find its mummy.

Penguin Solitaire:
Move all cards to the foundations to build four full sequences. There are two versions here: Penguin (Tuxedo) and Penguin (Original).

Sawayama Solitaire:
This is similar to the common Klondike Solitaire except for a few changes to make it more strategic.

Check out more Solitaire games here.

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