Skip to content
LessonPrint

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

Next set

One paper per student

12345678910111213141516171819202122232425

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 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.One effect the wolves had on other animals
  • B.How many wolves there were
  • C.The year the wolves returned
2.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.How long it took and who built it
  • B.How long the wall is
  • C.What country the wall is in
3.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
4.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.What lava is made of
  • B.Where volcanoes form
  • C.How far an eruption's effects can reach
5.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.What the roads were made of
  • B.Why the roads mattered to the army
  • C.Who built the roads
6.Text 1 says beavers build dams from sticks and mud. Text 2 says the dams slow rivers and store water for dry summers. What does Text 2 add?
  • A.How beavers build their dams
  • B.What beavers eat
  • C.What the dams do for the land
7.Text 1 says sea turtles lay their eggs on beaches. Text 2 says the warmth of the sand decides whether the hatchlings are male or female. What does Text 2 add?
  • A.How the sand affects the young turtles
  • B.Where turtles lay their eggs
  • C.What turtles eat at sea
8.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 quickly the discovery was put to use
  • B.Who discovered X-rays
  • C.How X-rays were named

LessonPrint · RI.4.9 · Set 19 · free to copy for classroom use

Answer key — What One Adds to the Other

Set 19. Prints on its own sheet.

  1. 1.One effect the wolves had on other animals
  2. 2.How long it took and who built it
  3. 3.A problem the railways ran into
  4. 4.How far an eruption's effects can reach
  5. 5.Why the roads mattered to the army
  6. 6.What the dams do for the land
  7. 7.How the sand affects the young turtles
  8. 8.How quickly the discovery was put to use

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