· Cut the sheets down the middle and slide each half into a sealed DL-sized envelope with one end cut open.
· Learners pull out the ‘ladder’ one bit at a time as they mentally solve each step.
· Correct answer is exposed at the bottom.
· Play in pairs as a possible alternative. Both learners work out the answers and check each other at the end.
· Laminate for extra sturdiness.
· Feel free to edit the document as you wish
Numbers to 20 Numbers to 100
Numbers to 999
· Numbers up to 50
Start with 9 / Start with 10Double it / Double it
Add 2 / Add 15
Subtract 5 / Subtract 3
Add 10 / Halve it
Subtract 13 / Add 2
Halve it / Subtract 8
Ready to check? / Ready to check?
The answer is 6 / The answer is 10
Numbers less than 20
Double it / Double it
Add 1 more / Add 2 more
Subtract 3 / Take away 4
Add 10 / Halve it
Subtract 12 / Add 2
Halve it / Subtract 8
Ready to check? / Ready to check?
The answer is 2 / The answer is 1
Numbers up to 100
Double it / Halve it
Add 20 / Add 15
Take away 40 / Subtract 25
Halve it / Double it
Subtract 5 / Add 33
Halve it / Subtract 5
Ready to check? / Ready to check?
The answer is 5 / The answer is 48
Numbers up to 999
Start with 36 / Start with 88
Double it / Halve it
Add 12 / Add 19
Take away 46 / Subtract 15
Halve it / Double it
Subtract 15 / Add 233
Add 428 / Subtract 5
Ready to check? / Ready to check?
The answer is 432 / The answer is 324
Numbers up to 999
Double it / Halve it
Add 98 / Add 215
Take away 258 / Subtract 190
Halve it / Double it
Subtract 50 / Add 72
Add 25 / Subtract 41
Ready to check? / Ready to check?
The answer is 45 / The answer is 491
Numbers up to 100
Start with 7 / Start with 20Double it / Double it
Double your answer / Double your answer
Subtract 5 / Add 15
Add 30 / Subtract 45
Subtract 13 / Halve it
Halve it / Subtract 13
Ready to check? / Ready to check?
The answer is 20 / The answer is 12
Numbers up to 200
Start with 36 / Start with 19
Halve it / Add 60
Add 50 / Subtract 25
Subtract 17 / Add 16
Add 24 / Subtract 35
Subtract 25 / Add 5
Halve it / Halve it
Ready to check? / Ready to check?
The answer is 50 / The answer is 20
South African Numeracy Chair Project 2013