## Numbers and Operations in Base Ten

5.NBT.7 Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties or operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

In grade five, students expand on their grade-four work of comparing decimals and begin to add,

subtract, multiply, and divide decimals to hundredths (5.NBT.7 ). They focus on reasoning about

operations with decimals by using concrete models, math drawings, various strategies, and explana-

tions. They also extend to decimal values the concrete models and written methods they developed

for whole numbers in grades one through four. Students might estimate answers based on their

understanding of operations and the value of the numbers (MP.7, MP.8).

subtract, multiply, and divide decimals to hundredths (5.NBT.7 ). They focus on reasoning about

operations with decimals by using concrete models, math drawings, various strategies, and explana-

tions. They also extend to decimal values the concrete models and written methods they developed

for whole numbers in grades one through four. Students might estimate answers based on their

understanding of operations and the value of the numbers (MP.7, MP.8).