How to add or subtract using partitioning
To partition a number using place values is to split it into tens and units etc. as appropriate, to use partitioning for subtraction you split the number being subtracted into tens and units then subtract the units from the given number to create a new number, then you subtract the tens from the new number to get the final answer.
53 - 15
subtract units 53 - 5 = 48
subtract tens 48 - 10 = 38
answer = 38
To partition a number using place values is to split it into thousands, hundreds, tens and units etc. as appropriate, to use partitioning for addition you split both numbers then add their like parts together then add those totals together to get the final answer.
1253 + 65
tens 50 + 60 = 110
units 3 + 5 = 8
answer 1000 + 200 + 110 + 8 = 1318
Check your answers using your calculator.
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Subtract or add these numbers using partitioning