Subtraction using number bonds

Related Topics:
More Singapore Math Lessons
Number Bond Games



 

Videos, worksheets, solutions and activities to help students learn subtraction using number bonds in Singapore Math.

In this lesson, we will learn

• subtracting ones using number bonds
• subtracting tens using number bonds
• subtracting tens and ones using number bonds.

When subtracting 2-digit numbers, the Singapore Math teaches the students to subtract tens and ones using number bonds. The steps are shown below. With sufficient practice, the students should be able to do the math in their heads.

Subtracting Ones

For example, 17 − 3 = ?
Step 1: Use Number bond to split. 17 = 10 + 7
Step 2: Subtract the ones. 7 − 3 = 4
Step 3: 10 + 4 = 14
Step 4: 17 − 3 = 14

For example, 12 − 7 = ?
Step 1: Use Number bond to split. 12 = 10 + 2
Step 2: Subtract the ones. 10 − 7 = 3
Step 3: 2 + 3 = 5
Step 4: 12 − 7 = 5

For example, 69 − 2 = ?
Step 1: Use Number bond to split. 69 = 60 + 9
Step 2: Subtract the ones. 9 − 2 = 7
Step 3: 60 + 7 = 67
Step 4: 69 − 2 = 67

For example, 72 − 8 = ?
Step 1: Use Number bond to split. 72 = 60 + 12
Step 2: 12 − 8 = 4
Step 3: 60 + 4 = 64
Step 4: 72 − 8 = 64

Singapore Math subtraction using number bonds
Example:
Subtract a One-Digit Number from a Two-Digit Number - Subtraction using number bonds
19 − 6 = ?
13 − 2 = ?
17 − 7 = ?
14 − 3 = ?

• Show Step-by-step Solutions

Singapore Math Grade 1A Subtraction
This video show how to subtract a single digit number from a two digit number that has a number in the ones place smaller then the value being subtracted
Example:
11 − 3 = ?

• Show Step-by-step Solutions

Examples of subtraction using number bonds
17 − 3 = ?
12 − 4 = ?
16 − 8 = ?
14 − 6 = ?
18 − 9 = ?
13 − 5 = ?

• Show Step-by-step Solutions

Singapore Math subtraction using number bonds (word problems)
Examples:
1) Jane has 17 gel pens. She gave away 4 gel pens to her friend. How many gel pens is Jane left with?
2) Joyce has 18 toy cars. She gave away 5 of them. How many does Joyce have left?

• Show Step-by-step Solutions

Subtracting Tens

For example, 95 − 40 = ?
Step 1: Use Number bond to split. 95 = 90 + 5
Step 2: 90 − 40 = 50
Step 3: 50 + 5 = 55
Step 4: 95 − 40 = 55

Subtracting Tens and Ones

For example, 78 − 24 = ?
Step 1: Use Number bond to split. 78 = 70 + 8, 24 = 20 + 4
Step 2: Subtract the tens. 70 − 20 = 50
Step 3: Subtract the ones. 8 − 4 = 4
Step 4: 50 + 4 = 54
Step 4: 78 − 24 = 54

For example, 74 − 28 = ?
Step 1: Use Number bond to split. 74 = 60 + 14, 28 = 20 + 8
Step 2: Subtract the tens. 60 − 20 = 40
Step 3: Subtract the ones. 14 − 8 = 6
Step 4: 40 + 6 = 46
Step 4: 72 − 28 = 46

Subtraction with Number Bonds and the Arrow Way
Example:
56 - 30

• Show Step-by-step Solutions

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.