Differences within 20 worksheet · Math Level 15

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 15 of 40 in Learning Lab's math ladder, in the “Subtracting” stage. Many children reach it around ages 6–7, 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 15

Differences within 20

M15-6ZXB

Riley · Week of Nov 2

Name: Score: / 20 · Review / 3

1.14−6
2.11−3
3.15−5
4.19−7
5.14−4
6.16−1
7.12−4
8.17−1
9.13−8
10.13−5
11.14−7
12.18−1
13.18−6
14.12−10
15.20−3
16.15−8
17.16−5
18.13−2
19.17−6
20.18−10

Review — from earlier levels

21.6 − 2 = __
22.7 − 2 = __
23.3 − 0 = __

Learning Lab · Answer key

Math · Level 15

Differences within 20

M15-6ZXB

Riley · Week of Nov 2

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

8
8
10
12
10
15
8
16
5
8
7
17
12
2
17
7
11
11
11
8
4 review
5 review
3 review