12158 1540150081C +20 (C+d)​

Question

12158 1540150081C +20 (C+d)​

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Answer 1

Ответ:

8+7=15

20•(7+8)=300

12+8=20

20•(12+8)=400

15+15=30

20•(15+15)=600

40+1=41

20•(40+1)=820

50+0=50

20•(50+0)=1000