intuimath.

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  Base-ten blocks

  Ten ones make a rod. Take it apart again whenever you like.

• 1 47 +18 65

  Column addition

  Add down the columns, carrying the ten as you go.

• 5 62 −27 35

  Column subtraction

  Take away column by column, borrowing a ten when you need one.

• 1 24 ×3 72

  Column multiplication

  Multiply digit by digit, keeping every column in its place.

• 2 × 3

  Times tables

  Work each table out from one you already know.

• Speed

  Watch a car eat the same distance every second, then say where it stops.

• Hit the target

  Find the missing number: set the cannon's charge so the shot lands on the target.

• Negative numbers

  How far is it from −5 to 7? Jump to zero, then on.

• Electricity

  Push current round a circuit and watch voltage, resistance and power answer back.

Little number worlds

• Number line

  Slide it, zoom in to tenths or out to thousands. Drop pins and draw jumps.

• Triangle area

  Draw rectangles, compare equal parts and discover triangle area.

• Triangle area & perimeter

  Practise triangle areas, perimeters and missing lengths.

• Rectangle area & perimeter

  Count the squares, measure the boundary and find missing sides.

• Radius, diameter & circumference

  Unroll a circle. Discover how many diameters fit around it.

• Circle area

  Cut a circle into wedges. Lay them in a row and watch a rectangle emerge.

• Solving equalities

  Make the same move on both sides. Find the missing number.

• Balance scales

  Take an object off. Watch the scales and the written move.

• ● ↓ ▰

  Addition machine

  Tap a block. Watch it fall, settle, and join the collection.

• 8 + 6 → 14

  Jump over ten

  One number on each row of two ten frames. The first frame fills; type the sum.

• 25 → 40

  First to Forty

  Roll, draw, and trade tens and ones. A block game for two.

• ▰ → ▪ ▪ ▪

  Shape shifter

  Same blocks. New shape. Transform your pieces to fill the outline.

• ▦ ▰ ▪

  Base-ten block workshop

  A mat full of classroom blocks. Build, join, turn and take apart.

• ▰ · · ·

  Build a bridge

  Make a river crossing from long beams and little tiles.

• ▣ + ▣

  The parcel workshop

  Two deliveries. Many ways to pack them. Can everything fit?

• ● ▰ ▦

  Number-shape playground

  Join, split, invent. Collect different shapes of the same number.

• ▣ ?

  Repair the robot

  Something went astray in the packing machine. Tinker until it works.

• ▰ · = · ▰

  Two builders, one number

  Match a friend’s blueprint by reshaping your own pieces.

Still to write: long multiplication, short division, long division.