Вариант 9. 1) 50,343648 - 7; 2) 7,5 · 3,003096; 3) 22,64542 : 1,75; 4) 794,18575 : 38; 5) 79,57705 - 17,57705; 6) 41,76754 + 8,23246; 7) 9,64396 - 4,9743; 8) 8,601851 + 716,307351; 9) 0,00008 · 0,3; 10) 7 : 0,000875; 11) 994,52445 + 8,584287; 12) 320 · 2,003125.

Решение:

1. \( 50,343648 - 7 = 43,343648 \)
2. \( 7,5 \cdot 3,003096 = 22,52322 \)
3. \( 22,64542 : 1,75 = 12,94024 \)
4. \( 794,18575 : 38 = 20,899625 \)
5. \( 79,57705 - 17,57705 = 62 \)
6. \( 41,76754 + 8,23246 = 50 \)
7. \( 9,64396 - 4,9743 = 4,66966 \)
8. \( 8,601851 + 716,307351 = 724,909202 \)
9. \( 0,00008 \cdot 0,3 = 0,000024 \)
10. \( 7 : 0,000875 = 8000 \)
11. \( 994,52445 + 8,584287 = 1003,108737 \)
12. \( 320 \cdot 2,003125 = 641 \)

Ответ: 1) 43,343648; 2) 22,52322; 3) 12,94024; 4) 20,899625; 5) 62; 6) 50; 7) 4,66966; 8) 724,909202; 9) 0,000024; 10) 8000; 11) 1003,108737; 12) 641.