P3 Large numbers and operation order
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multiply up to three digits by one digit
Calculate 407 × 6.
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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. The written multiplication algorithm preserves place values while regrouping.
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 two-digit numbers mentally Calculate 94 + 38 mentally.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.