Sums and Differences of Decimals

Students relate decimals to mixed numbers and round addends, minuends, and subtrahends to whole numbers in order to predict reasonable answers. Students use their knowledge of adding and subtracting multi-digit numbers to find the sums and differences of decimals. Students understand the importance of place value and solve problems in real-world contexts. Students have also acquired knowledge of all operations with fractions and decimals to the hundredths place in previous grades.