Coventry Numeracy Resources - Calculations Index

Resource	Areas covered
Add Expand	TU + TU, TU + TU + TU, HTU + HTU, HTU + HTU + HTU, ThHTU + ThHTU, ThHTU + ThHTU + ThHTU, TU.th + TU.th, TU.th + TU.th + TU.th
Add horizontal - PV cards	Using place value cards to mentally add 2 numbers TU + TU, HTU + HTU
Add Vertical Expanded - PV cards	Expanded addition using place value cards TU + TU, HTU + HTU
Calculation - rods and coins	Tens and units for place value Use rods / coins to mentally add / subtract 2 numbers U + U, TU + TU TU - TU
Chunking	Calculation adapted from TU ¸ U to ThHTU ¸ TU - can take up to 4 stages
Decompexpand	HTU ? HTU, ThHTU ? ThHTU TU.t ? TU.t TU.th ? TU.th
Subtract - Number Line	Use the number line to show the jumps on the number line 1 to 10, 1 to 20, across 10, across a multiple of 10, TU-TU, HTU-HTU, ThHTU-ThHTU U.t-U.t, TU.t-TU.t, U.th-U.th
Subtract horizontal - PV cards	Using place value cards to mentally subtract 2 numbers TU ? TU , HTU - HTU
What's wrong?	Spot the calculation mistake within each example of the grid method shown.

IWB Resources