These are our Sum up 100 (with regrouping) grade 1 to 6 addition worksheets. Click on the thumbs to go to download page.


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Our other Addition Worksheets


On this page you find our primary math addition worksheets, made for math grades 1 to 6. Our addition exercises and worksheets are suited for any math school, online math instruction, and remedial addition and math practice. For math grade 1 we have a large selection of addition pictures worksheets, addition line worksheets, single digit addition problems, addition up to 100 worksheets, addition bonds exercises and worksheets with skip counting exercises.

For the second and third math grades, you can use our addition up to 1,000 and 10,000 worksheets, 3 and 4 digit addition worksheets, addition of like fractions worksheets, skip counting by 2 digit worksheets, missing addends and missing digits worksheets and our addition puzzles and addition squares. Our addition puzzles are a great way for math students to practice their overall logic and math skills.

For the higher primary math grades we offer addition of larger numbers worksheets, addition of unlike fractions, addition of decimals worksheets, addition of integers and the more difficult levels of our math addition puzzles. A great way to learn addition and math is by completing our estimation of addition problems materials. This will give the students more confidence in checking and assessing their work and addition skills.

Our Fubuki addition puzzles come in 3 difficulty levels and the objective is to complete the 3 by 3 grids with the numbers 1 to 9 in such that all rows and columns add up to the given sums. Very challenging and great to train the math brain.

Addition squares are also challenging math activities. Students need to complete the tables and calculate the values of the missing addends in the squares. Finding the solutions to these addition puzzle problems involves both addition and subtraction skills.

Our addition worksheets for math grades 1 to 6 cover: addition in pictures worksheets, addition lines worksheets, addition number bonds worksheets, single digit addition worksheets, skip counting addition exercises, adding 2, 3 and 4 digits addition worksheets, adding large numbers worksheets, adding fractions worksheets, adding decimals worksheets, adding integers and negative numbers, estimation of addition sums, addition math puzzles, addition squares puzzles, missing addends worksheets and mixed addition and subtraction worksheets.


Our remedial Addition resources are based on the following Singaporean Curriculum math topics:

  • Completing addition bonds and family facts
  • Solving addition problems using pictures
  • Being able to show the working of addition steps on number lines
  • Being able to add single digit numbers with and without regrouping
  • Adding 2 and 3 digit numbers up to 1,000
  • Adding larger numbers up to ten thousands, hundred thousands and millions
  • Knowing the relationship between addition and subtraction
  • Being able to find and calculate missing addends
  • Being able to estimate the sums and outcomes of addition problems
  • Knowing how to add like and unlike fractions
  • Being able to add decimals numbers
  • Being able to add negative numbers and integers
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