P2 Large numbers and operation order
Today’s problem — free all day, every step. Every day has one.
add three-digit numbers
Calculate 357 + 216.
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573
The pattern behind it: Large numbers and operation order
Group digits by place value, then do brackets and multiplication or division before addition or subtraction.
In this one. Place-value alignment makes regrouping reliable.
How to spot it
Two numbers to add with carrying, several numbers to put in order, or a sum mixing addition, multiplication and brackets, all point here.
Common mistake
Children forget to carry a ten into the next column, or compare digits from the left without first checking the numbers have the same number of digits.
Try one like it
Standard add three-digit numbers Calculate 248 + 156.The 33 problem patterns
All 33 patterns, one to a page — the 19 behind Primary 5 and 6 word problems, and the skills the younger years are built on. The bar model, how to spot it in the question, and the mistake children make. A booklet you can print. Free.
A PDF, and a note when new solutions go up.