StackCalc Place Value Studio Dual Trays & 53 Blocks

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Place Value Studio & Regrouping Trays

Q: How do the two rows on each tray handle addition carrying and subtraction borrowing?

Each tray features a 6x2 socket grid. For addition, Row 1 holds the first addend and Row 0 holds the second addend. When a column exceeds 9, the student stacks a +1 regrouping counter directly onto the next column to the left. For subtraction, Row 1 holds the minuend and Row 0 holds the subtrahend; borrowing is executed by decomposing 1 unit from the higher column and transferring it as 10 to the active column.

Q: How does the kit teach decimal place value?

The kit includes a dedicated 6x2 Decimal Numbers Tray (.1, .01, .001, 10^-4, 10^-5, 10^-6) with a tactile decimal point on its left edge. Placing the Whole Numbers Tray (100K, 10K, 1K, 100, 10, 1) and Decimal Tray side-by-side forms a continuous 12-column real-number workstation.

Q: How does the kit connect to the SC-6 Elementary Calculator?

The SC-6 features a dedicated [PV] Place Value hardware key and LCD screen mode. Pressing [PV] extracts the exact power-of-ten components of any calculation on screen, mirroring the physical digit blocks in the trays.

PEDAGOGICAL STANDARD • Concrete Multi-Digit Arithmetic & Decimal Bridging ✓ 42mm Gridfinity Compliant

$38.00 ✓ Free US Shipping • In Stock

Transform abstract place value and decimal regrouping into tangible, self-correcting understanding. Features dual 6×2 desktop activity trays (Whole Numbers & Decimals), 44 precision digit blocks (0–9), and 9 stackable +1 regrouping tokens housed in a modular 3×1 Gridfinity storage box with Snapfinity sliding lid.

✓ Dual 6×2 Activity Trays: Whole Numbers tray (100k down to 1) and Decimal Numbers tray (0.1 to 0.000001) with tactile decimal separator point.

✓ 53 Tactile Miniblocks: 4 full sets of digits 0–9, 4 extra zeros, and 9 stackable +1 carry/borrow tokens.

✓ Vertical Carries & Borrows: Two operational rows permit vertical column alignment; stackable +1 tokens click directly onto digit blocks to physically model carrying a ten.

✓ SC-6 Hardware Synergy: Direct tactile companion to the SC-6 elementary calculator's dedicated [PV] Place Value decomposition mode.

Order on Etsy ($38.00) ↗ Download 3MF on Printables ↗

Aligned Chapter → SC-6 Book (Amazon) ↗ Workbook (Amazon) ↗ Free 3MF (Printables) ↗ Curriculum Guide → Technical Specs ↓

✓ Durable Matte Polymer • 42mm Gridfinity

✓ Anti-Heartbreak $2.49 Part Refills

✓ Secure Checkout via Etsy

The Video Showcase: Two-Row Regrouping & Decimals in Action

Watch how dual 6×2 trays turn confusing carrying and borrowing algorithms into physical, self-checking block movements.

Place Value Studio: Addition, Subtraction & Decimal Bridging

Demonstrating 47 + 28 with a physical +1 carry token stacked onto the tens block, followed by decimal alignment across the tactile separator.

Technical Specifications

Tactile proportions and modular classroom storage.

Outer Box Dimensions	126.0 mm (L) × 42.0 mm (W) × 42.0 mm (H) • Standard 3x1x7U Gridfinity bin
Activity Trays	Two 6×2 pull-out trays (117.4 × 38.6 mm): Whole Numbers (`100K, 10K, 1K, 100, 10, 1`) and Decimal Numbers (`.1, .01, .001, 10^-4, 10^-5, 10^-6`)
Miniblock Footprint	0.5U Gridfinity pitch (19.0 × 19.0 mm), 7.0 mm visible height, 1.85 mm recessed top stacking socket
Pieces Included (52 Total)	44 symmetric digit blocks (22 White Set A: 4× '0', 2× '1–9'; 22 Slate Blue-Gray Set B: 4× '0', 2× '1–9') + 4 stackable +1 regrouping carry tokens + 2 inner 6×2 trays (Whole + Decimal) + 1 7U box (12 labeled floor sockets) + 1 `[123]` lid = 52 pieces
Material	Non-toxic matte PETG/PLA polymer • Washable with warm water and soap
Curriculum Standards	Common Core: CCSS.MATH.CONTENT.1.NBT.B.2, 2.NBT.B.5, 3.NBT.A.2, 4.NBT.A.1, 5.NBT.A.1 • TEKS: 111.3.b.2, 111.4.b.2