Description
These three activities help students practice building their mental math skills by becoming aware of how to use benchmark problems to estimate answers for other problems. The OVER and UNDER activity helps students estimate whether a math answer is under or over a certain number. For instance: 50 x 10= 500, so 49x 10 would be less than 500, but 51 x 10 would be over. Students could use their reasoning skills and share their methods with others. This is a great activity to use as a whole group, but can also be used in a math center. Group response cards and student sheets are available.
The two compatible number activities help students quickly add more than two numbers by putting together compatibles, numbers that equal 50 or 100. Answer cards are available. I have used these for early finishers and accelerated students who like the challenge of practicing mental math.
The two compatible number activities help students quickly add more than two numbers by putting together compatibles, numbers that equal 50 or 100. Answer cards are available. I have used these for early finishers and accelerated students who like the challenge of practicing mental math.
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Mental Math/ Number Sense: Estimation, compatibles: Wake your Math Brain UP!!!
Hill Country Creations
131 Followers
$2.75
Highlights
Digital downloads
Grades
3rd - 6th
Subjects
Standards
CCSS5.NBT.A.2
CCSS3.OA.C.7
CCSS4.OA.A.2
Pages
47
Answer Key
Included
Teaching Duration
3 days
Description
These three activities help students practice building their mental math skills by becoming aware of how to use benchmark problems to estimate answers for other problems. The OVER and UNDER activity helps students estimate whether a math answer is under or over a certain number. For instance: 50 x 10= 500, so 49x 10 would be less than 500, but 51 x 10 would be over. Students could use their reasoning skills and share their methods with others. This is a great activity to use as a whole group, but can also be used in a math center. Group response cards and student sheets are available.
The two compatible number activities help students quickly add more than two numbers by putting together compatibles, numbers that equal 50 or 100. Answer cards are available. I have used these for early finishers and accelerated students who like the challenge of practicing mental math.
The two compatible number activities help students quickly add more than two numbers by putting together compatibles, numbers that equal 50 or 100. Answer cards are available. I have used these for early finishers and accelerated students who like the challenge of practicing mental math.
Report this resource to TPT
Reported resources will be reviewed by our team. Report this resource to let us know if this resource violates TPT's content guidelines.
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Standards
to see state-specific standards (only available in the US).
CCSS5.NBT.A.2
Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10.
CCSS3.OA.C.7
Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.
CCSS4.OA.A.2
Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.
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