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Cathi

US Edition Textbook 6B

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Draw the situation after first.

|------|------|------| roses

|------| carnations

Show 10 more for the roses

|------|------|------| ___10___| roses

|------| carnations

Then, show 50 more for the carnations, and make the total carnations twice the roses. A bit hard to draw here. 

|------|------|------| ___10__| roses

|------| ________________|_________________| carnations

Drop in the rose bar into the carnation bar, for each half.

|------|------|------| ___10__|------|------|------| ___10__|

Rearrange

|------|------|------|------|------|------| __10__| ___10__|

Compare to original

|------|------|------|------|------|------| __10__| __10__|

|------| ________________|_________________|

 

(Doesn't come out completely lined up)  The bar that is not the first unit is 50. 

Can you see that 50 - 10 - 10 = 5 units?

Go from there.

 

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