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Unknown-addend problems Transitional Reasoning Practice

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

5 Math practice questions on Unknown-addend problems. Questions that build towards applied reasoning.

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Questions

  1. 1.

    A courier begins the morning route with an empty van and loads 35 standard packages at a warehouse. At a second collection depot, the courier loads an uncounted container of express packages. Before heading to the sorting hub, the courier stops at an office complex and unloads 14 of the standard packages. If there are exactly 48 total packages remaining inside the van upon arrival at the sorting hub, how many express packages were in the container?

    • A) 27 express packages
    • B) 13 express packages
    • C) 41 express packages
    • D) 69 express packages
  2. 2.

    An athlete is competing in a 60-kilometer trail race that is divided into three consecutive stages. The athlete completes the first stage of 24 kilometers, runs an unrecorded distance along a mountain path for the second stage, and finishes the final stage of 17 kilometers to cross the finish line. If the combined length of all three stages equals the entire 60-kilometer course, how many kilometers did the athlete run along the mountain path?

    • A) 17 kilometers
    • B) 19 kilometers
    • C) 21 kilometers
    • D) 36 kilometers
  3. 3.

    A laboratory technician places two calibration weights of 46 grams and 29 grams on the left pan of a balanced beam scale. On the right pan, she places one calibration weight of 38 grams along with a sealed specimen jar of unknown mass. When all items are in place, the scale rests in perfect horizontal equilibrium. What is the mass, in grams, of the sealed specimen jar?

    • A) 37 grams
    • B) 47 grams
    • C) 33 grams
    • D) 29 grams
  4. 4.

    A science museum designed a dual-chamber terrarium that must house a total of 75 ladybugs. Chamber A currently contains 38 ladybugs. Chamber B contains 19 adult ladybugs and a covered shelter with uncounted young ladybugs. If the two chambers together have exactly the required 75 ladybugs, how many young ladybugs are inside the covered shelter?

    • A) 37
    • B) 28
    • C) 18
    • D) 22
  5. 5.

    Liam is assembling craft kits for a community workshop where each complete kit must contain exactly 45 colored markers. In one kit, he finds 18 red markers and an uncounted pouch of green markers. He then adds 12 blue markers to complete the kit and reaches the required total of 45 markers. How many green markers were in the pouch?

    • A) 27
    • B) 33
    • C) 21
    • D) 15

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