

For more practice,

The Wonder Number Lessons
Lesson No. 12: Division, No Remainder Division with no remainder separates groups into equal parts. The Wonder Number Board provides visual and manipulative evidence through the colorcoding of factors in each individual block. The first problem is 20 ÷ 5. Place a viewer on 20 and then place a green chip on all the multiples of 5 from 5 to 20. Count the number of chips on the board, and you will find there are 4 multiples of 5 in the number 20 (see fig 63). Remove the last chip from the number 20 and look at the factor pairs listed inside the block (see fig 64). One pair features a green 5 with a 4 below it, illustrating 5 x 4 = 20. Division is the inverse operation of multiplication so 20 ÷ 5 = 4. The second problem is 28 ÷ 4. Place a viewer on 28 and then place a yellow chip on all the multiples of 4 from 4 to 28. Count the number of chips on the board and you will find there are 7 multiples of 4 in the number 28 (see fig 65). Remove the last chip from the number 28 and look at the factor pairs listed inside the block (see fig 66). One pair features a yellow 4 with a 7 below it, illustrating 4 x 7 = 28. Division is the inverse operation of multiplication so 28 ÷ 4 = 7. 
