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Mental Math/Strategies
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Place Value Blocks
Number Line
Story Problems
100
784
What is 684+100=
100
20
How many students voted on their favorite subject?
100
445
If Ms. W and Ms. J combine their blocks, how much will they have all together?
100
327, 195
What subtraction problem is represented by the model? ___-132=
100
507 students
The zoo has 206 2nd graders and 301 3rd graders. All students are at the zoo. How many students are there total at the zoo?
200
223
What is 323-100=?
200
6
How many students like science more than math?
200
She added 255.
If Ms. T adds her blocks to make a total of 700, how many blocks did Ms. T add? Explain using numbers, pictures or words.
200
345
Using the same strategy, solve 467-122=?
200
407 students
Of all the 2nd and 3rd grade students at the zoo, 100 went on the bus. How many are left at the zoo?
300
437
What is =427+10?
300
2
How many fewer students liked writing than social studies?
300
496
What is 765-269=?
300
699
What is 456+243=?
400
548
What is =558-10?
400
370
What is 829-459=?
400
664
What is 248+416=?
500
640
What is 425+640? Please show and explain your strategy.