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Within 20 (make ten, doubles, fact families) Knowledge-Based Practice

Math · Number Sense & Operations · Math · Addition & Subtraction

5 Math practice questions on Within 20 (make ten, doubles, fact families). Questions that assess core concepts and understanding.

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Questions

  1. 1.

    Which group of numbers forms a fact family that has only two distinct equations instead of four?

    • A) 4, 7, and 11
    • B) 5, 9, and 14
    • C) 6, 7, and 13
    • D) 8, 8, and 16
  2. 2.

    Which steps correctly show how to find the difference 15−815 - 8 by subtracting to ten first?

    • A) 15−3=1215 - 3 = 12, then 12−5=712 - 5 = 7
    • B) 15−5=1015 - 5 = 10, then 10−3=710 - 3 = 7
    • C) 15−4=1115 - 4 = 11, then 11−4=711 - 4 = 7
    • D) 15−2=1315 - 2 = 13, then 13−6=713 - 6 = 7
  3. 3.

    Which equation correctly applies the doubles-plus-one strategy to find the sum of 7+87 + 8?

    • A) 8+8+1=178 + 8 + 1 = 17
    • B) 7+7−1=137 + 7 - 1 = 13
    • C) 7+7+1=157 + 7 + 1 = 15
    • D) 6+6+2=146 + 6 + 2 = 14
  4. 4.

    Which equation belongs to the fact family formed by the numbers 6, 9, and 15?

    • A) 15+6=2115 + 6 = 21
    • B) 9−6=39 - 6 = 3
    • C) 15−5=1015 - 5 = 10
    • D) 15−9=615 - 9 = 6
  5. 5.

    Which expression shows the make-ten strategy used to find the sum of 8+78 + 7?

    • A) 8+1+68 + 1 + 6
    • B) 8+3+48 + 3 + 4
    • C) 8+2+58 + 2 + 5
    • D) 8+4+38 + 4 + 3

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