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    Second Grade
    Today

    Unit test · Weeks 7–12 · 35–40 min · 52 points

    Math Unit 2 Test: Addition & Subtraction Within 100

    Name Date

    Part 1: Computation Fluency

    Solve. Use any strategy. Show your work in the box.

    1. 49 + 36 = ____
    2. 83 − 26 = ____
    3. 68 + 25 = ____
    4. 94 − 58 = ____
    5. 70 − 34 = ____
    6. 17 + 46 + 25 = ____
    7. 12 + 27 + 33 + 19 = ____
    8. 458 + 271 = ____
    9. 367 + 245 = ____
    10. 715 − 482 = ____

    Part 2: Mental Math (±10, ±100)

    Solve in your head. Write the answer.

    1. 10 more than 436 is ____. 10 less than 436 is ____.
    2. 100 more than 258 is ____. 100 less than 258 is ____.
    3. 10 more than 695 is ____. 10 less than 703 is ____.
    4. 100 less than 180 is ____. 100 more than 900 is ____.
    5. 527 + ____ = 627 850 − ____ = 840
    6. A school library has 342 books. It gets 100 more books, then 10 more books. How many books does it have now?

    Part 3: Word Problems

    Read the story. Draw a picture or a bar model. Write an equation with a ? for the unknown. Write the answer with a word.

    1. Maya picked 38 apples. Her brother picked 49 apples. How many apples did they pick in all?
    2. A farm had 83 chickens. Some were sold. Now 55 chickens are left. How many chickens were sold?
    3. Tia read 23 pages on Monday, 42 pages on Tuesday and 15 pages on Wednesday. How many pages did she read?
    4. A theater has 450 seats. 276 seats have people in them. How many seats are empty?

    Part 4: Strategy Explanation

    Show and explain your thinking with words, numbers or drawings.

    1. Solve 38 + 46 two different ways. You can use make a ten, an open number line, or tens and ones. Tell why both ways give the same answer.
    2. Ali solved 73 − 39 and got 46. What mistake did Ali make? Solve it the right way. Explain the trade with tens and ones.