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Activity 1

Use number facts to add and subtract 1-digit numbers to and from 2-digit numbers

 

Use nine 10p and nine 1p coins. Use cards with 2, 3, 4 and 5 written on them spread face down.

Take two cards to generate an addition, e.g. 3 + 4. Show this using 1p coins.

 

Write the addition, 3 + 4 = 7.

Next add a 10p to the first of the two piles and write the new addition: 13 + 4 = 17.

Then add another 10p, writing the new addition: 23 + 4 = 27.

Continue up to 93 + 4 = 97.

 

Repeat the same process using the number cards to generate different starting additions 

e.g. 5 + 4 = 9, 2 + 4 = 6

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