Number and Operationsin Base Ten
Use place value understanding and properties of operations to perform multi-digit arithmetic
3.NBT.A.1Use place value understanding to round whole numbers to the nearest 10 or 100.
What's the Nearest Ten? What's the Nearest Hundred? 214212
Round to the Nearest Ten 216
Round to the Nearest Hundred 217
Estimating Sums (ver. 1) 219Estimating Sums (ver. 2) Estimating Differences (ver. 1) (^220221)
Estimating Differences (ver. 2) 222
3.NBT.A.2Fluently add and subtract within 1000 using strategies and algorithms based on place value,
properties of operations, and/or the relationship between addition and subtraction.
Close to Zero (3-digit) 223
Add the Difference 225
3 Digit Addition Split 3 Digit Subtraction Split (^226230)
Doubling to 1000 234
3.NBT.A.3Multiply one-digit whole numbers by multiples of 10 in the range 10-90 (e.g., 9x80, 5x60)
using strategies based on place value and properties of operations.
Multiples of Ten Multiply 235
Word Problems: Multiply by Multiples of Ten 238
Number and Operations:Fractions
Develop understanding of fractions as numbers
3.NF.A.1Understand a fraction 1/b as a quantity formed by 1 part when a whole is portioned into b
equal parts: understand a fraction a/b as the quantity formed by a parts of size 1/b.
Making Fraction Strips (ver. 1) 240
Making Fraction Strips (ver. 2) Cuisenaire Fractions 243242
My Fraction Bar Riddle 244
Fraction Posters 246
Name the Fraction 247
Math Read Aloud Task Card:Picture Pie 251
3.NF.A.2diagram.Understand a fraction as a number on the number line; represent fractions on a number line
a. Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole
and portioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the
part based at 0 locates the number 1/b on the number line.
Fractionson a Number Line 253
b. Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize
that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.Sample Activities:
Roll a Fraction 254
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