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.Multiplying by multiples of 103.NBT.A.3Multiply one-digit numbers by multiples of 10 using place value.
3.NBT Number & Operations in Base Ten worksheets
Worksheets for 2 Common Core standards in Number & Operations in Base Ten, Grade 3. Each worksheet has three levels and an answer key.
Make a mixed 3.NBT worksheet