medium Set 21 Form Exercise

Write the fact family for 1, 15, 16:

Show answer

Answer: 1 + 15 = 16; 15 + 1 = 16; 16 - 1 = 15; 16 - 15 = 1

SubType
fact-family
Facts
  • 1 + 15 = 16
  • 15 + 1 = 16
  • 16 - 1 = 15
  • 16 - 15 = 1
Difficulty
normal

Write the fact family for 4, 2, 6:

Show answer

Answer: 4 + 2 = 6; 2 + 4 = 6; 6 - 4 = 2; 6 - 2 = 4

SubType
fact-family
Facts
  • 4 + 2 = 6
  • 2 + 4 = 6
  • 6 - 4 = 2
  • 6 - 2 = 4
Difficulty
normal

Write the fact family for 19, 1, 20:

Show answer

Answer: 19 + 1 = 20; 1 + 19 = 20; 20 - 19 = 1; 20 - 1 = 19

SubType
fact-family
Facts
  • 19 + 1 = 20
  • 1 + 19 = 20
  • 20 - 19 = 1
  • 20 - 1 = 19
Difficulty
normal

Write the fact family for 12, 1, 13:

Show answer

Answer: 12 + 1 = 13; 1 + 12 = 13; 13 - 12 = 1; 13 - 1 = 12

SubType
fact-family
Facts
  • 12 + 1 = 13
  • 1 + 12 = 13
  • 13 - 12 = 1
  • 13 - 1 = 12
Difficulty
normal

Write the fact family for 12, 6, 18:

Show answer

Answer: 12 + 6 = 18; 6 + 12 = 18; 18 - 12 = 6; 18 - 6 = 12

SubType
fact-family
Facts
  • 12 + 6 = 18
  • 6 + 12 = 18
  • 18 - 12 = 6
  • 18 - 6 = 12
Difficulty
normal

Write the fact family for 16, 3, 19:

Show answer

Answer: 16 + 3 = 19; 3 + 16 = 19; 19 - 16 = 3; 19 - 3 = 16

SubType
fact-family
Facts
  • 16 + 3 = 19
  • 3 + 16 = 19
  • 19 - 16 = 3
  • 19 - 3 = 16
Difficulty
normal