Mathematics·Addition & Subtraction·procedural
Mentally adding hundreds to 3-digit numbers
Mentally add and subtract a three-digit number and hundreds
Suggested ages 7–8
Learning journey
Your child is advancing their calculation skills — learning to add and subtract larger numbers up to 1000, mastering mental math strategies, and solving more complex word problems.
Evidence of understanding
- Calculate 345 + 200 mentally
- Calculate 762 − 400 mentally
- Explain that only the hundreds digit changes
Assessment prompt
Can Mentally adding hundreds to 3-digit numbers quickly work out '342 + 200' or '756 − 300' in their head — knowing that only the hundreds digit changes?
Standards alignment
Ma/KS2/Y3/AS/1cGB · uk-nc-2013
Mental addition/subtraction (hundreds)
The national curriculum in England: Key stages 1 and 2 framework document · Key Stage 2