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a farmer used fence post to build a fence for hazel horse and Polly Pony the farmer used 26 fence posts to build hazel horses fence and 19 fence posts to build Polly ponies fence how many fence posts did the farmer use in all and if you like or I encourage you to pause the video and try to figure it out so I'm assuming you have tried it so let's think it through together so when everything about a word problem like this a little bit what are they asking and just what's the story in our head so farmer is building fence posts for two different horses hazel horse and Polly pony and there's even a picture of Hazel horse here and Polly pony they look very similar the farmer used 26 fence posts to build Hazel horses fence so that's these 26 fence post is right 26 fence posts right over here so these are the 26 fence posts for Hazel horses fence I haven't counted it but I'll just take their word for it that they're 26 here and then 19 fence posts to build Polly ponies fence so these are 19 fence posts right over here how many fence posts that the farmer used in all in all so what do they want us to do they want us to add or subtract these numbers well they're looking in all how many total fence posts did the farmer use well the total is how many used in Hazel's fence and Polly's fence so we should add these two numbers so we're going to add 26 plus the 19 or let me see the 26 is in that brownish color 26 that's the 26 fence post to build Hazel horses fence and we're going to add that to 19 we're going to add that to 19 so 26 for hazel horse and then 19 for Polly pony we want to add them because we're saying how many fence posts were used in all if we combine in Hazel's and Polly's fences so let's add these two together so first let's go to the ones place six ones plus nine ones is 15 ones but we don't we only write one digit here so 15 ones is the same thing as five ones and one 10 right 15 is just one ten and five ones so we've essentially regrouped that those 10 ones as one 10 right over here or some people say you carry the 1 but that's all that's saying we're seeing 6 plus 9 is 15 15 is 5 ones and 1 10 we wrote that one 10 in the tens place and then 1 10 plus 2 tens plus 1 10 well 1 plus 2 plus 1 is 4 so it's going to be 4 tens so 45 how many fence posts using all 44 85 now some of y'all that might have somehow tried to maybe subtract the 19 4 20 from 26 that would have been what you would have done if they said how many more fence posts did the the farmer used for Hazel's fence than for Polly's then you would subtract 19 from 26 to find the difference but they didn't ask us how many more fence posts were used for Hazelden for Polly or how many fewer fence posts were used for Polly than hazel they didn't ask us that they said how many fence posts did the farmer use in all and that's why we added