Make a number line to add

"Okay, we've got it, the PERFECT treehouse." "Now all we need to do is get the materials and BUILD it!" Mr. Squeaks is ready to work, but first, he needs to add his materials to make sure he has the right amount of everything. "Make a Number Line to Add." Mr. Squeaks can use a number line to add his materials together. First, he has twenty-one planks of wood and forty-five nails, but he is unsure if he bought enough. He needs to add the number of planks and nails together using the number line. When adding using a number line, start by drawing the number line. Then, put the larger number that you are adding, or larger ADDEND, on the LEFT side under the first dash. We need to put FORTY-FIVE on the LEFT side since it is the largest number. Next, we can count forwards by different amounts depending on the other addend. Here it is twenty-one. We can break twenty apart into two tens and then count forwards in steps of ten. Let’s count. Ten more than forty-five is fifty-five and ten more than fifty-five is sixty-five. Then, we add smaller amounts for the rest. We only have one left, so we add one more. Finally, we can find our sum by looking at the number that we ended on. Mr. Squeaks has sixty-six planks and nails all together, which is enough! Next, Mr. Squeaks is adding his roof tiles. He wants to make a pattern out of the two different colours, but he needs to see how many he has altogether. If Mr. Squeaks has thirty-seven orange roof tiles and forty-three blue roof tiles, how many does he have in total? Start by creating an equation and draw the number line. We create thirty-seven plus forty-three. Next, put the larger addend on the LEFT side. The larger addend in this equation is forty-three, so, we'll put it on the LEFT side. Finally, count forwards by small amounts of the other addend. Thirty-seven has three tens, so we can count in steps of ten three times until we reach seventy-three. We can then add on the final seven. The last step is to find the sum by looking at the number we ended on eighty. That means Mr. Squeaks has eighty roof tiles. Finally, Mr. Squeaks also has some flowers to decorate with. If Mr. Squeaks has sixty-seven blue flowers, and twenty-five orange flowers, how many does he have altogether?

Remember, we can put the larger addend on the LEFT side. Then, we need to count forwards by the other addend, twenty-five. If we count forwards by small amounts of twenty-five, what number will we land on? We will land on the number ninety-two. Mr. Squeaks has ninety-two flowers altogether. Before we see that treehouse, let's summarise. When making a number line to add, remember: first, create an equation and draw your number line. Next, put the larger addend on the left side. Then, count forwards by the smaller addend. Finally, the number that you land on is your sum! Now, let's see that treehouse! "Hmm, where did all of my nails go?" "Imani!"