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What One Adds to the Other is a free printable Grade 4 English worksheet on identifying what a second text adds to the first, aligned to Common Core standard RI.4.9. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 10 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

What One Adds to the Other

RI.4.9

NameDate

Circle the right answer.

1.Text 1 says the Wright brothers flew the first powered plane in 1903. Text 2 says the flight lasted twelve seconds. What does Text 2 add?
  • A.Who flew the first plane
  • B.The year of the first flight
  • C.How short the first flight was
2.Text 1 says volcanoes form where hot rock rises. Text 2 says the ash from one eruption cooled the whole world for a year. What does Text 2 add?
  • A.How far an eruption's effects can reach
  • B.What lava is made of
  • C.Where volcanoes form
3.Text 1 says the Great Wall of China is thousands of kilometers long. Text 2 says it was built over many centuries by different rulers. What does Text 2 add?
  • A.What country the wall is in
  • B.How long the wall is
  • C.How long it took and who built it
4.Text 1 says Rontgen discovered X-rays in 1895. Text 2 says that within a year hospitals were using X-rays to find broken bones. What does Text 2 add?
  • A.How X-rays were named
  • B.Who discovered X-rays
  • C.How quickly the discovery was put to use
5.Text 1 says honeybees live in hives of thousands. Text 2 says farmers rent hives so bees will pollinate their orchards. What does Text 2 add?
  • A.How many bees live in a hive
  • B.How people depend on bees
  • C.How bees make honey
6.Text 1 says the Romans built straight roads across Britain. Text 2 says soldiers could march twenty miles a day on them. What does Text 2 add?
  • A.Why the roads mattered to the army
  • B.What the roads were made of
  • C.Who built the roads
7.Text 1 says wolves were brought back to Yellowstone in 1995. Text 2 says elk stopped grazing by the rivers once the wolves returned. What does Text 2 add?
  • A.The year the wolves returned
  • B.How many wolves there were
  • C.One effect the wolves had on other animals
8.Text 1 says trains crossed Britain by the 1840s. Text 2 says each town kept its own time, so schedules were confusing. What does Text 2 add?
  • A.A problem the railways ran into
  • B.How fast the trains went
  • C.When the trains crossed Britain

LessonPrint · RI.4.9 · Set 10 · free to copy for classroom use

Answer key — What One Adds to the Other

Set 10. Prints on its own sheet.

  1. 1.How short the first flight was
  2. 2.How far an eruption's effects can reach
  3. 3.How long it took and who built it
  4. 4.How quickly the discovery was put to use
  5. 5.How people depend on bees
  6. 6.Why the roads mattered to the army
  7. 7.One effect the wolves had on other animals
  8. 8.A problem the railways ran into

Last reviewed 2026-09-05. Aligned to RI.4.9 of the Common Core State Standards for English Language Arts.