7+ Maths
Membership
Sign in
Maths
›
Algebra
›
Finding An Unknown Number By Adding
Finding An Unknown Number By Adding
Find an unknown number by adding
Add the known numbers together
The result is the unknown number
5:00
Start
Reset
Check
Answer
‹ Prev
Next ›
ANSWER
×
Got it — next →
Know how your child is really doing 📈
×
Practising is free — but members unlock the bit parents love:
✅
Progress tracking across every topic
🎯
Reports that pinpoint weak spots
♾️
Unlimited fresh, auto-marked questions
⏱️
Exam-style timer & spaced repetition
£99
/ year · one payment, no auto-renew
See membership
Maybe later
