Sums within 20 worksheet

A real Learning Lab sheet for a pretend child, Riley. Sign in free to get sheets like this every week at your child's own level.

Level 9 of 40 in Learning Lab's math ladder, in the “Adding” stage. Many children reach it around age 6, but levels aren't tied to age.

This sheet has 20 questions at this level plus 3 review questions from the levels just before it. Mastered after three sheets in a row at 90% or more. It can be printed or done on screen in kid mode.

Learning Lab

Math · Level 9

Sums within 20

M9-9JNN

Riley · Week of Nov 2

Name: Score: / 20 · Review / 3

1.2 + 9 = __
2.3+10
3.10+5
4.8+10
5.5 + 8 = __
6.1+10
7.8 + 7 = __
8.7 + 8 = __
9.5 + 6 = __
10.9 + 3 = __
11.9 + 9 = __
12.10+2
13.8 + 8 = __
14.6 + 5 = __
15.10+10
16.3 + 8 = __
17.6+10
18.4 + 9 = __
19.10+9
20.8 + 4 = __

Review — from earlier levels

21.10+0
22.75, 76, __, 78, 79
23.30, 40, __, 60, 70

Learning Lab · Answer key

Math · Level 9

Sums within 20

M9-9JNN

Riley · Week of Nov 2

For grown-ups — keep this page separate from the sheet.

11
13
15
18
13
11
15
15
11
12
18
12
16
11
20
11
16
13
19
12
10 review
77 review
50 review

Math Level 9: Sums within 20

Review — from earlier levels