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it is expected that after passing through all the worksheets students deepen their understanding of place value of numbers and their understanding of and skill with addition, subtraction, multiplication, and division of whole numbers. Students may become competent to estimate, measure, and describe objects in space. They use different known and guided patterns to help solve problems. They represent number relationships and conduct simple comparative, sequence based and probability based experiments. o mental addition and subtraction o regrouping in addition and subtraction o basic word problems o multiplication tables and basic division facts o Basic multiplication and related concepts o Formation of division and multiplication sentences. o clock to the minute and elapsed time calculations. o basic money calculations (finding totals and change) o place value and rounding with four-digit numbers o quadrilaterals, perimeter, and area o division and related concepts (remainder, word problems) o measuring lines in inches and centimeters o basic usage of measuring units