Grade 2 STAAR: Estimating Sums & Using Number Lines

Lily has 3 apples and picks 5 more from the tree. How many apples does she have now? Use a number line to help you find the answer.

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Tom has 12 marbles. He gives 4 marbles to his friend. How many marbles does Tom have left? Estimate the sum before calculating.

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A farmer has 7 cows and buys 6 more. How many cows does he have in total? Use a number line to show your work.

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Samantha read 8 books in January and 5 books in February. How many books did she read in total? Estimate the total number of books first.

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There are 9 birds on a tree. 3 more birds join them. How many birds are there now? Use a number line to find the answer.

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In a box, there are 10 chocolates. If you eat 2 chocolates, how many are left? Estimate how many chocolates you will have after eating some.

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A toy store has 15 teddy bears. They sell 7 teddy bears. How many teddy bears are left in the store? Use a number line to help you solve this problem.

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Emma has 4 stickers, and her friend gives her 6 more. How many stickers does Emma have now? Estimate the total before solving.

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At a party, there are 5 balloons. If 8 more balloons are added, how many balloons are there in total? Use a number line to find the answer.

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A gardener plants 6 flowers in the morning and 4 flowers in the afternoon. How many flowers did the gardener plant in total? Estimate the total number of flowers first.

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