Videos, worksheets, solutions and activities to help students learn subtraction using number bonds in Singapore Math.
In this lesson, we will learn
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
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
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
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