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### Algebra Explorations Concepts, Pre-K through Grade ?

CK-12 Algebra Explorations is a hands-on series of activities that guides students from Pre-K to Grade 7 through algebraic concepts.

It is an educational content of CK-12 Foundation (to access some of ...

### Many ways to solve problems

Interpret data in tables and graphs.

Read, compare and put two and three-digit numbers in order.

Observe the regularities of the numeral system between the three-digit numbers.

Solve additions, subtracti ...

### What's the time?

Improve in their abilities in identifying properties and elements of geometric shapes.

Analyse regularities of the numeral system, relating the name and written form of two-digit numbers.

Differentiate ...

### Know more about the numbering system

Progress in reading double-entry tables.

Explore different strategies to solve multiplication problems.

Begin to build up a repertoire of multiplication calculations.

Calculate durations based on times s ...

### Comparing Numbers

Identify the order of the elements of a series, using ordinal numbers from first (1st) to tenth (10th).

Improve in telling the time in both digital and analogue clocks.

### Calendars and calculations

Know and identify the right and left positions.

Advance in the use of strategies for establishing comparisons of amounts, and evaluate and designate them.

Use criteria to compare numbers based on the am ...

### Order, compare and operate

Compare the mass of animals using personal strategies.

Explore some measuring instruments.

Read and write two-digit numbers, taking into account their place value.

Observe that, when we add the addends o ...

### Geometrical concepts: flat figures

Read, write and put numbers in order, exploring the place value of the digits.

Relate the oral and written series of numbers for reading and writing numbers.

Have a repertoire of memorised calculation r ...

### Numbers to measure and operating

Use known calculations to solve addition and subtraction problems that involve different aspects of such calculations.

Recognise the characteristics of some geometric shapes and establish relationships ...

### Adding and subtracting: Extending concepts

Know the distribution of the days of the week and months of the year, and use the calendar to find dates and determine lengths of time.

Explore regularities in the numerical series to name, read, and w ...