820. Выполните действия столбиком
1) (2,6 + 3,7) - 5;
2) (18,07 – 6,03) - 8;
3) (24,95 + 17,8) - 9;
4) (48,316 – 19,83) : 20;
5) (15,07 – 8,9) - 30;
6) (2 – 0,7) - 50.
пожалуйста пж пж пж​
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