Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
Here is a collection of our common core aligned worksheets for core standard 2.NBT.B.8.
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Count by tens to add the multiples of ten.
Core Standard: 2.NBT.B.8
Use mental math to solve the addition problems.
Core Standard: 2.NBT.B.8
Count on by hundreds to add multiples of 100.
Core Standard: 2.NBT.B.8
Round the numbers to the nearest 100, then add the two rounded numbers.
Core Standard: 2.NBT.B.8
Round the numbers to the nearest 10, then add the rounded numbers.
Core Standard: 2.NBT.B.8
Round the numbers to the nearest 100.Then subtract to get the answer.
Core Standard: 2.NBT.B.8
Round the numbers to the nearest 10.Then subtract to find each difference.
Core Standard: 2.NBT.B.8
Round the numbers to the nearest 10.Then subtract to find each difference.
Core Standard: 2.NBT.B.8
Practice subtraction with multiples of 100.
Core Standard: 2.NBT.B.8