Ones to thousands
Add ones, tens, hundreds and thousands so students can see the structure of a number.
Free maths tool
MAB blocks tool
A free interactive base-ten block workspace for building numbers, arranging by place value, regrouping and unpacking ones, tens, hundreds and thousands.
Build numbers
Enter a number up to 9999 and build it with matching MAB blocks.
Place value
Arrange blocks by place value so each part of the number has a visible position.
Regrouping
Regroup ten smaller blocks into one larger block or unpack a selected block into ten smaller parts.
What the tool does
The MAB blocks tool gives teachers and students a clean base-ten workspace for building and changing numbers on screen.
- add ones, tens, hundreds and thousands
- build a chosen number with base-ten blocks
- arrange blocks by place value
- regroup ten matching smaller blocks into one larger block
- unpack a selected block into ten smaller blocks
How teachers use it
Open it on a classroom display when students need to connect a written number to the blocks that make its value.
- build a two, three or four digit number before writing expanded notation
- arrange the blocks into thousands, hundreds, tens and ones columns
- model why ten ones can become one ten
- unpack a ten or hundred before discussing subtraction with regrouping
Why it is useful
MAB blocks help students see that each digit has a value because of its place, not just because of its symbol.
- connects digits, expanded notation and concrete models
- makes regrouping visible before it becomes a written procedure
- keeps the lesson moving without physical block setup time
Frequently Asked Questions
Is the MAB blocks tool free?
Yes. Teachers, students and families can open the MAB blocks tool in a browser for free.
What blocks are included?
The tool includes ones, tens, hundreds and thousands so students can model whole numbers up to 9999.
Can it show regrouping?
Yes. The tool can regroup ten smaller matching blocks into one larger block and unpack a selected block into ten smaller blocks.
Does it score student answers?
No. It is an open modelling tool, not a scored practice activity or student-tracking page.