## Maths 7.1 Whole Number

• ##### Doubling and Halving
No items in this section
• ##### Estimation
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## Maths 7.1 Whole Number

### Make a Ten: PhET Simulation

Simulation Guide: make-a-ten-html-guide_en

• Place Value
• Subtraction
• Arithmetic

#### Description

Add numbers by making tens. Break apart and combine numbers while focusing on place value. Use the adding screen to add any two numbers. Use the game screen to apply your make-a-ten strategies!

#### Sample Learning Goals

• Improve understanding of place value by using different sizes of papers for ones, tens, and hundreds.
• Develop mental math strategies when taking apart and putting together numbers.
• Use the “make a ten” strategy when counting and doing addition.
• Develop a mental model of the basic properties of numbers including commutativity, associativity, and closure.

This activity aligns with learning outcomes for Year 7 Solomon Islands Mathematics Curriculum:

Place Value:

• 7.1.4 understand that our number system is “Base 10” and are made up of the following digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 (u)
• 7.1.4.1 write and express numbers in figures using digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9, and also in words
• 7.1.5 understand that a position of individual digits in a number holds different values and names (u)
• 7.1.5.1 identify the names and values of numbers in respect to the positions of the digits in the Place Value Table
• 7.1.5.2 arrange numbers in ascending and descending order according to their values.

All simulations available at http://phet.colorado.edu are open educational resources available under the Creative Commons Attribution license (CC-BY).

Permission is granted to freely use, share, or redistribute PhET sims under the CC-BY license.