1) 42: 0,35 3,24: 5,4 7:56+2,8: 0,56; 2) (52,91: 1,3 1,472: 0,46) 2,6+1,13;

Решение:

1. \( 42 : 0.35 = 120 \)
2. \( 3.24 : 5.4 = 0.6 \)
3. \( 7 \cdot 56 = 392 \)
4. \( 2.8 : 0.56 = 5 \)
5. \( 52.91 : 1.3 = 40.7 \)
6. \( 1.472 : 0.46 = 3.2 \)
7. \( 40.7 - 3.2 = 37.5 \)
8. \( 37.5 \cdot 2.6 = 97.5 \)
9. \( 97.5 + 1.13 = 98.63 \)

Ответ: 1) 120; 0,6; 392; 5; 2) 98,63.