The student must be able to add 10, 20, 30, 40, 50, 60, 70, 80, or 90 and 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9 using concrete models such as base-ten models, place value disks, linking cubes, and pictorial models such as base-ten pictorials, place value disks, open number lines, and strip diagrams. They must be efficient in modeling their sums, explaining their addition strategies, and recording their number sentences.
Rad the following problem solving situations. Be ready to share your solutions and thinking!a) Linda has 70 sparkly rocks in her collection. Kevin gave her 8 more sparkly rocks. How many sparkly rocks does Linda have? Draw a picture on your paper to model your solution and record your answer with a number sentence.
b) The first grade class is playing a game of softball outside. There are 2 teams of 10 children and 2 extra children to be umpires. How many children are in the 1st grade class? Draw a picture on your paper to model your solution and record your answer with a number sentence.
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1.3 Number and operations. The student applies mathematical process standards to develop and use strategies for whole number addition and subtraction computations in order to solve problems. The student is expected to:
(A) use concrete and pictorial models to determine the sum of a multiple of 10 and a one-digit number in problems up to 99