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A "how to do addition" Example - By HelpingWithMath.com

Related Resources

The Addition and subtraction Lesson explained above is aligned with the standard 2NBT05 from the Common Core Standards For Mathematics (see the shortened extract below). The resources below are also aligned to this standard.

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

Flashcards

• Addition - Sums to 49
• Addition - Sums to 99
• Subtraction - Numbers to 49
• Subtraction - Numbers to 99

Games

• Number Bonds To 30
• Number Bonds To 40
• Number Bonds To 50
• Number Bonds To 100

Lessons

Quizzes

• Addition with making 20 e.g. 18 + 7 = 25
• Addition with making multiples of 10 e.g. 66 + 8 = 74

Worksheets

Bridging

• Making (Bridging) Multiples of 10 e.g. 17 + 5, 78 + 7

Number bonds

• Number bonds to 20 e.g.8 + ___ = 20
• Number bonds to 30 e.g.26 + ___ = 30
• Number bonds to 40 e.g.12 + ___ = 40
• Number bonds to 50 e.g.17 + ___ = 50
• Number bonds to 100 e.g. 43 + ___ = 100
• Number Bonds To 100 (with blank number lines)

Slightly Different

• Adding To Subtract e.g. 45 - 27 = (45+3 = 48) - (27+3=30) = 18

To 100

• 2-digit & 1-digit - no regrouping e.g. 34 + 5, 56 - 4
• 2-digit numbers - no regrouping e.g. 42 + 36, 34 + 12
• 2-digit numbers - regrouping e.g. 47 + 16, 78 - 29
• 2-digit - 1-digit - no regrouping e.g. 68 - 5
• 2-digit - 1-digit - regrouping e.g. 65 - 7
• 2-digit - 2 -digit - no regrouping e.g. 86 - 43
• 2-digit - 2-digit - regrouping e.g. 57 - 39