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The student will recall addition facts with sums to 20 or less and the corresponding subtraction facts.
The student, given two whole numbers whose sum is 99 or less, will a) estimate the sum; and b) find the sum, using various methods of calculation.
The student, given two whole numbers, each of which is 99 or less, will a) estimate the difference; and b) find the difference, using various methods of calculation.
The student will create and solve one- and two-step addition and subtraction problems, using data from simple tables, picture graphs, and bar graphs.
The student will recognize and describe the related facts that represent and describe the inverse relationship between addition and subtraction.