Jan buys 3 bags of beads. Each bag contains 7 beads. Draw a bar diagram and write an addition equation and a multiplication equation to show how many beads Jan buys. How are the equation related?

Answer:   - The diagram bar is attached.   - Addition equation:  [tex]7+7+7=21[/tex]   - Multiplication equation: [tex](3)(7)=21[/tex]   -  How are the equation related? Each equation shows 3 groups of 7. Step-by-step explanation: We know that Jan buys 3 bags of beads and each bag contains 7 beads, then, you can draw the bar diagram shown attached.  Observe that the diagram has 3 blocks (each block represents a bag of bead) and there is a number 7 inside of each block (which is the number of beads contained in a bag). Therefore: - Add the numbers inside the blocks in order to get the addition equation that shows the number of  beads Jan buys. This is: [tex]7+7+7=21[/tex] - Multiply 3 blocks by 7 in order to get multiplication equation that show the number of beads Jan buys: [tex](3)(7)=21[/tex] The equations are related. Each one shows 3 groups of 7.