These task cards are designed to actively engage students as they practice adding, subtracting, multiplying and dividing decimals. QR codes are included on each card for self checking and technology integration. Real world word problems, powers of 10, expanded notation with multiplication, rounding, reading and writing decimal numbers are some of the many skills incorporated. The file was created with 5th grade common core standards but can easily be used in grades 4-6. An answer sheet as well as an answer key are included.