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Addition within 20 booklet

A printable 16-page A4 workbook for Grades 1 and 2. Free, with an answer key and a certificate.

Sheets are A4. On US Letter paper, choose "Fit to page" (or "Scale to fit") in your print settings. Free, with no sign-up.

A look inside

Math booklet: Addition within 20

16 pages: ten frames, number line, crossing ten, making 10 and 20, doubles

This booklet belongs to: ______________________
  1. Warm-up: adding to 10
  2. Ten frames
  3. The number line
  4. Adding to 20 without crossing ten
  5. Making 10
  6. Making 20
  7. Adding across ten
  8. Doubles
  9. Adding with pictures
  10. The missing number
  11. Three addends
  12. Greater, less or equal
  13. Word problems
  14. Answer key for parents

For parents: one or two pages at a time is plenty. Start with the first pages and move on only when adding within 10 is secure. Fingers, blocks and the number line are welcome. The answers are on the second to last page.

Warm-up: adding to 10Name: ____________ Page 2 of the bookletSolve the problems1.2 + 3 = ____2.4 + 5 = ____3.6 + 3 = ____4.7 + 2 = ____5.5 + 5 = ____6.8 + 1 = ____7.3 + 6 = ____8.4 + 4 = ____9.1 + 9 = ____10.6 + 4 = ____11.2 + 7 = ____12.5 + 3 = ____
Ten framesName: ____________ Page 3 of the bookletCount the dots in both frames and write the problem__ + __ = ____ + __ = ____ + __ = ____ + __ = ____ + __ = __
The number lineName: ____________ Page 4 of the bookletStart at the first number and hop forward. Write the answer.8 + 5 = ____012345678910111213141516171819206 + 7 = ____012345678910111213141516171819209 + 4 = ____012345678910111213141516171819207 + 6 = ____012345678910111213141516171819205 + 9 = ____01234567891011121314151617181920
Adding to 20 without crossing tenName: ____________ Page 5 of the bookletAdd the ones and keep the ten1.11 + 4 = ____2.12 + 5 = ____3.13 + 3 = ____4.14 + 5 = ____5.10 + 7 = ____6.15 + 2 = ____7.12 + 6 = ____8.13 + 4 = ____9.16 + 3 = ____10.11 + 8 = ____11.14 + 4 = ____12.10 + 9 = ____
Making 10Name: ____________ Page 6 of the bookletWrite how many more to reach 101.7 + ____ = 102.4 + ____ = 103.9 + ____ = 104.2 + ____ = 105.6 + ____ = 106.3 + ____ = 107.8 + ____ = 108.5 + ____ = 109.1 + ____ = 1010.10 + ____ = 10
Making 20Name: ____________ Page 7 of the bookletWrite how many more to reach 201.15 + ____ = 202.12 + ____ = 203.18 + ____ = 204.14 + ____ = 205.11 + ____ = 206.17 + ____ = 207.13 + ____ = 208.19 + ____ = 20
Adding across tenName: ____________ Page 8 of the bookletMake ten first, then add the rest1.9 + 4 = ____2.8 + 5 = ____3.7 + 6 = ____4.9 + 7 = ____5.8 + 6 = ____6.6 + 5 = ____7.9 + 5 = ____8.7 + 8 = ____9.8 + 9 = ____10.7 + 5 = ____11.6 + 9 = ____12.4 + 8 = ____
DoublesName: ____________ Page 9 of the bookletAdd a number to itself, then to its neighbor1.3 + 3 = ____2.4 + 4 = ____3.5 + 5 = ____4.6 + 6 = ____5.7 + 7 = ____6.8 + 8 = ____7.9 + 9 = ____8.10 + 10 = ____9.6 + 7 = ____10.8 + 9 = ____11.7 + 8 = ____12.4 + 5 = ____
Adding with picturesName: ____________ Page 10 of the bookletCount each group and write the problem and the answer🍎🍎🍎🍎🍎🍎+🍎🍎🍎🍎🍎__ + __ = __⭐⭐⭐⭐⭐⭐⭐+⭐⭐⭐⭐__ + __ = __🐟🐟🐟🐟🐟🐟🐟🐟+🐟🐟🐟__ + __ = __🎈🎈🎈🎈🎈🎈🎈🎈🎈+🎈🎈🎈🎈🎈🎈__ + __ = __🍪🍪🍪🍪🍪🍪🍪+🍪🍪🍪🍪🍪🍪🍪__ + __ = __
The missing numberName: ____________ Page 11 of the bookletWrite the number that is missing1.6 + ____ = 142.9 + ____ = 173.8 + ____ = 154.____ + 7 = 165.____ + 5 = 136.4 + ____ = 127.____ + 8 = 188.7 + ____ = 199.____ + 9 = 1510.5 + ____ = 11
Three addendsName: ____________ Page 12 of the bookletAdd from left to right, or look for two numbers that make ten1.3 + 4 + 5 = ____2.6 + 2 + 7 = ____3.5 + 5 + 4 = ____4.8 + 3 + 2 = ____5.4 + 6 + 6 = ____6.7 + 1 + 9 = ____7.2 + 9 + 8 = ____8.3 + 3 + 10 = ____
Greater, less or equal?Name: ____________ Page 13 of the bookletWork out each side and write < or > or = in the circle8 + 57 + 76 + 65 + 89 + 47 + 610 + 69 + 87 + 76 + 89 + 910 + 7

📖 Word problems

Name: ______________ · Page 14 of the booklet · Write a number sentence and the answer

  1. Maya has 8 cat stickers and 6 dog stickers. How many stickers does she have in all?
    Number sentence: ______________   Answer: ______________
  2. There are 9 red flowers and 5 yellow flowers in the garden. How many flowers are in the garden?
    Number sentence: ______________   Answer: ______________
  3. Ben read 7 pages on Sunday and 8 more pages on Monday. How many pages did he read in the two days?
    Number sentence: ______________   Answer: ______________
  4. There are 12 apples in a bowl. Dad adds 6 more apples. How many apples are in the bowl now?
    Number sentence: ______________   Answer: ______________
  5. Tamar has 9 dollars. Mom gives her 9 more dollars. How many dollars does Tamar have?
    Number sentence: ______________   Answer: ______________
  6. There are 11 girls and 7 boys in the class. How many children are in the class?
    Number sentence: ______________   Answer: ______________

✅ Answer key for parents

Answers are numbered in the order of the exercises on each page, row by row.

Page 2: Warm-up: adding to 10
1) 52) 93) 94) 95) 106) 97) 98) 89) 1010) 1011) 912) 8
Page 3: Ten frames
1) 7 + 5 = 122) 8 + 4 = 123) 6 + 6 = 124) 9 + 3 = 125) 5 + 8 = 13
Page 4: The number line
1) 132) 133) 134) 135) 14
Page 5: Adding to 20 without crossing ten
1) 152) 173) 164) 195) 176) 177) 188) 179) 1910) 1911) 1812) 19
Page 6: Making 10
1) 32) 63) 14) 85) 46) 77) 28) 59) 910) 0
Page 7: Making 20
1) 52) 83) 24) 65) 96) 37) 78) 1
Page 8: Adding across ten
1) 132) 133) 134) 165) 146) 117) 148) 159) 1710) 1211) 1512) 12
Page 9: Doubles
1) 62) 83) 104) 125) 146) 167) 188) 209) 1310) 1711) 1512) 9
Page 10: Adding with pictures
1) 6 + 5 = 112) 7 + 4 = 113) 8 + 3 = 114) 9 + 6 = 155) 7 + 7 = 14
Page 11: The missing number
1) 82) 83) 74) 95) 86) 87) 108) 129) 610) 6
Page 12: Three addends
1) 122) 153) 144) 135) 166) 177) 198) 16
Page 13: Greater, less or equal
1) 13 < 142) 12 < 133) 13 = 134) 16 < 175) 14 = 146) 18 > 17
Page 14: Word problems
1) 8 + 6 = 142) 9 + 5 = 143) 7 + 8 = 154) 12 + 6 = 185) 9 + 9 = 186) 11 + 7 = 18

Certificate of achievement

This certificate is awarded to

______________________

for finishing the booklet Addition within 20: adding to 20, crossing ten, making 10 and 20, and solving word problems.

Great job, mathematician!

Date: ______________

Adding within 20 is the step after adding within 10, and the hard part is crossing ten, as in 8 + 5. This booklet builds up to it slowly: ten frames, a number line, adding without crossing ten, making 10 and 20, and only then crossing ten and doubles.

Every answer on the answer key is computed from the same numbers as the exercises, so the key always matches. The last pages mix everything: missing numbers, three addends, comparing sums and word problems.

Frequently asked questions

Which children is the booklet for?

Children in Grades 1 and 2 who are learning to add within 20. Start at the first page and move on only when adding within 10 is secure.

How many pages are there?

There are 16 A4 pages: a cover, 12 practice pages, a word problem page, an answer key for parents and a certificate.

How do I print on US Letter paper?

The pages are A4. Choose "Fit to page" in your print settings and they will fit on Letter paper.

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