4.NBT.A.2: Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form."3" on top row of keyboard: Select answer choice on right."2" on top row of keyboard: Select answer choice in center."1" on top row of keyboard: Select answer choice on left."Right Arrow" key: "Right Green Arrow" button after quiz completion."Left Arrow" key: "Left Green Arrow" button after quiz completion.Join Zac the Rat and his friends on an exciting learning journey, starting with the ABCs and 123s and advancing up to grade 3 grammar and mathematics. "Shift" key: Select fractions or decimals mode on selector screen Read, learn, and play with fun activities, games, and songs on Starfall Covers reading, math, music, and more - preschool to third grade.The program, provided by the Starfall Education Foundation, a nonprofit organization. "Enter" key: "Play" button, "Right Green Arrow" buttons, "Scratch Paper" button and coloring Duck Life 4 at Cool Math Games: The 4th great Duck Life game.Record the results of comparisons with symbols >, =, or, =, and < symbols to record the results of comparisons. Recognize that comparisons are valid only when the two fractions refer to the same whole. 4.NF.A.2: Compare two fractions with different numerators and different denominators, e.g., by creating common denominators or numerators, or by comparing to a benchmark fraction such as 1/2."Number" keys: Enter answer in the division quiz."Spacebar" key: Click pizza pans and slicer in quiz scenes."Y" and "N" keys: View demo "Yes" or "No"."Left Arrow" and "Right Arrow" keys: Select vehicle on selector screen, drive vehicle on street scene."Shift" key: Select multiply or divide mode on selector screen."Enter" key: "Play" button, "Right Green Arrow" buttons, "Purchase Vehicle" button.` key on top-left of keyboard: "Background Music" button.Use the relationship between multiplication and division to explain that 4 ÷ (1/5) = 20 because 20 × (1/5) = 4. For example, create a story context for 4 ÷ (1/5), and use a visual fraction model to show the quotient. 5.NF.B.7.B: Interpret division of a whole number by a unit fraction, and compute such quotients.For example, use a visual fraction model to represent 5/4 as the product 5 × (1/4), recording the conclusion by the equation 5/4 = 5 × (1/4). 4.NF.B.4.A: Understand a fraction a/ b as a multiple of 1/ b.