Khan Academy: Decimals in Expanded Form
Khan Academy: Rounding Decimals
D64 Student Video: Decimal Place Value
5-C.12 Multiply by 2-digit numbers: complete the missing steps
5-C.13 Multiply 2-digit numbers by 2-digit numbers
5-C.14 Multiply 2-digit numbers by 3-digit numbers
5-C.15 Multiply 2-digit numbers by larger numbers
5-C.17 Multiply three or more numbers up to 2 digits each
5-C.18 Multiply by 3-digit numbers
5-C.19 Multiply three numbers up to 3 digits each
5-D.11 Divide 2-digit and 3-digit numbers by 2-digit numbers
Estimating Products (Mr. Verdun)
D64 Student Video: Estimating Products
Khan Academy: Multi-Digit Multiplication
Khan Academy: Estimating Multi-Digit Division
Khan Academy: Strategies for Dividing Multiples of 10, 100, 1000
Khan Academy: Division Place Value
Khan Academy: Division Area Models
Khan Academy: Prime and Composite Numbers
D64 Student Video: Long Division
5-K.2 Fractions of a whole: word problems
5-L.4 Add and subtract fractions with like denominators: word problems
5-L.6 Add fractions with unlike denominators using models
5-L.7 Add up to 4 fractions with denominators of 10 and 100
5-L.8 Add fractions with unlike denominators
5-L.9 Subtract fractions with unlike denominators using models
5-L.10 Subtract fractions with unlike denominators
5-L.11 Add and subtract fractions with unlike denominators: word problems
5-L.12 Add 3 or more fractions with unlike denominators
5-L.13 Add 3 or more fractions: word problems
5-L.15 Complete addition and subtraction sentences with fractions
5-L.18 Add mixed numbers with unlike denominators
5-L.19 Subtract mixed numbers with unlike denominators
5-L.20 Add and subtract mixed numbers: word problems
5-L.21 Add and subtract fractions in recipes
5-L.22 Complete addition and subtraction sentences with mixed numbers