**Option 1**

1. Perform the steps:

1) 1,7 + 2,8

2) 9,2 – 3,4

3) 3,6 + 0,55

4) 10,3 – 8,17

5) 2,1 +3,16

6) 11 – 2,68

7) 7,3 + 0,865

8) 4,1 – 2,74

2. Calculate:

1) 7,91+631+7,01

2) 11,31+0,03-1,38

3. Solve the equations:

1) х +2,56 = 4

2) х – 14,158 = 9,842

3) (58 – х) – 41,3 = 6,287

4) 22,6-(9,8+х)=6,8

4. The store sold 87.5 kg of sugar on the first day and 9.85 kg more on the second day. How many kilograms of sugar did the store sell in two days?

5. The speed of the boat along the stream of the river is 16.3 km/h, the speed of the current is 2.6 km/h. Find the speed of the boat and its speed against the stream.

**Option 2**

1. Perform the steps:

1) 2,8 + 1,9

2) 6,5 -2,7

3) 8 + 2,6

4) 11,2 – 9,6

5) 2,58 + 1,4

6) 31 – 3,59

7) 0,906 + 12,8

8) 7,3 – 4,568

2. Calculate:

1) 8,92+4,32+4,03

2) 45,02+3,69+1,12

3. Solve the equations:

1) х +3,72 = 8

2) 14,6 – х = 5,293

3) 30,5-(х-2,57) =13,49

4) (28 – х) + 35,6 = 43,214

4. 28.96 tons of beets were harvested from one field, and 12.8 tons more from the second field. How many tons of beets were harvested from both fields together?

5. The speed of the ship against the flow of the river is 22.7 km/h, and the speed of the current is 2.1 km/h. Find the speed of the boat and its speed against the stream.