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Karolina [17]
3 years ago
15

Break a part the addends to find the sum 18+21

Mathematics
2 answers:
Mrac [35]3 years ago
4 0
18------10+8
20------20+1

10+8+20+1=39

Hope that helped:)
Pavel [41]3 years ago
3 0
- - Solve:
18 - - 10+8
21 - - 10+11

10+8+10+11=39

=18+21=39<span />
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