How can mastering mental math techniques for adding and subtracting 10 or 100 improve our daily life and decision-making?
Learner’s Mindset: Developing quick mental calculation skills for efficient problem-solving.
Critical Thinking: Applying mental math strategies in various contexts to make informed decisions.
Adaptive Perseverance: Practicing and mastering mental math techniques despite initial challenges.
Why is it useful to quickly add or subtract 10 or 100 in our heads?
How can mental math strategies for adding and subtracting 10 or 100 be applied in real-world scenarios?
What are some tips and tricks to make mental addition and subtraction of 10 or 100 easier?
Students will fluently add 10 or 100 to numbers between 100-900 in their heads.
Students will similarly subtract 10 or 100 from numbers within the same range without needing to write down the calculations.
Students will understand and demonstrate the practical applications of these mental math strategies in everyday situations.
Standard
2.NBT.B.8: Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
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