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Combined operations addition and subtraction 

range 1-20

 

Addition

6+8=
4+10=
2+10=
4+4=
6+10=
4+7=
3+1=
5+6=
4+6=
2+5=
7+4=
2+9=

Subtraction

11−1=
10−9=
11−9=
19−5=
6−4=
19−8=
11−3=
5−2=
16−6=
10−2=
16−5=
14−7=
Mixed Addition and Subtraction to 20www.sowa.study

About this worksheet

Addition and subtraction within 20 on one page: the facts every later calculation is built on.

Most of the work here is crossing ten: 8 + 5, 13 − 6. Teach one strategy and stay with it, for example "fill the ten first": 8 + 5 is 8 + 2 + 3. Subtraction goes back the same way: 13 − 6 is 13 − 3 − 3.

Press "Generate new" for a fresh set, with an answer key. For 1st grade.

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