Mental Addition: Whole Tens

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by Busy Buddies

Price: 300 points or $3 USD

Subjects: math,mathElementary,operationsAndAlgebraicThinking,additionAndSubtraction

Grades: 2,3,4

Description: 1. Add whole tens (10 to 90) to 2-digit numbers (1-99). Try to figure out the answers mentally. 2. Add whole tens to 2-digit numbers; all questions have a missing addend. 3. Add three 2-digit whole tens (such as 10 + 20 + 30)