Single-Digit Subtraction
Count back, think addition, and build lightning-fast subtraction fluency with facts within 18.
Count Back
Start at the big number and count backwards. 8−3: start at 8, count 7, 6, 5.
Use Related Addition
If you know 5+4=9, you automatically know 9−4=5 and 9−5=4!
Think "What's Missing?"
7−□=4? Think "4 + what = 7?" → 3. Turn subtraction into addition!
Fact Families — 4 facts for the price of 1!
3 + 4 = 7
4 + 3 = 7
7 − 3 = 4
7 − 4 = 3
5 + 6 = 11
6 + 5 = 11
11 − 5 = 6
11 − 6 = 5
4 + 8 = 12
8 + 4 = 12
12 − 4 = 8
12 − 8 = 4
Drill — Single-Digit Subtraction
Try to recall each fact instantly. Speed and accuracy build together!
Curriculum Standards & Learning Objectives
This worksheet topic strictly aligns with global mathematics curricula. Review the detailed learning outcomes and standard identifiers for Single-Digit Subtraction.
US Common Core
1.OA.C.6
Subtract within 20
CBSE (India)
Grade 1
Basic subtraction within 20
UK National Curriculum
Year 1
Subtract one-digit numbers
IGCSE
Foundation
Basic subtraction operations
Singapore Math
Primary 1
Subtraction within 20
Australian Curriculum
ACMNA015
Represent and solve subtraction problems
IB PYP
Early Years
Number operations
Canadian Curriculum
Grade 1
Subtraction facts to 20
New Zealand
Level 1
Basic subtraction strategies
UAE
Grade 1
Subtraction within 20
Saudi Arabia
Grade 1
Single-digit subtraction
ICSE (India)
Class 1
Subtraction basics
State Boards (India)
Class 1
Subtraction within 20
NCERT (India)
Class 1
Subtraction within 20
All other curricula (21-50)
Grade 1-2 equivalent
Basic subtraction