Rounding to the nearest 10 or 1003.NBT.A.1Round whole numbers to the nearest ten or hundred, with a number line to start and halfway cases to finish.Estimating sums and differences3.NBT.A.1Estimate sums and differences by rounding each number to the nearest ten or hundred first, then adding or subtracting the rounded numbers.
3.NBT.A.1 worksheets
These 2 worksheets teach Common Core standard 3.NBT.A.1, part of Number & Operations in Base Ten (3.NBT) in Grade 3. Each has three levels and an answer key.
Make one worksheet covering 3.NBT.A.1