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Worksheet: Addition of Three-Digit Numbers

Q1:

Calculate 6 7 6 + 9 9 .

Q2:

Complete the following: t e n s t e n t e n s t w e n t y - s i x t e n s + = , + = 2 6 0 .

  • AThirteen, 130, 100
  • BSixteen, 130, 100
  • CThirteen, 160, 100
  • DSixteen, 160, 100

Q3:

Complete the table below.

Number + 1 + 1 0 + 1 0 0
888 889 898 988
867
  • A868, 878, 978
  • B868, 876, 967
  • C867, 877, 967
  • D868, 877, 967

Q4:

3 4 4 + 5 5 3 = 5 5 3 + .

Q5:

Which of the following is equal to 3 3 6 + 3 5 0 ?

  • A 3 3 6 + 5 4 8
  • B 3 3 6 + 1 3 8
  • C 3 5 0 + 5 4 8
  • D 5 4 8 + 1 3 8

Q6:

Which number is 468 more than 421?

Q7:

Mentally calculate 3 5 7 + 8 9 .

Q8:

Complete the diagram below by following the arrows.

  • A200, 700, 700
  • B200, 600, 900
  • C200, 700, 800
  • D200, 700, 900
  • E200, 600, 800