Question

4×0,85-1/7÷5/14-1,56÷(-0,3)

Answer 1

= 3,4-1/7 × 14/5 -39/25 ÷(-0,3)=3,4-1/7 × 14/5 -39/25 ×1/3=3,4-2/5+39/25 ×1/3=17/5-2/5+39/25 × 1/3=17/5-2/5+13/25=88/25 якось так :>

Answer 2

Let's solve this expression step by step:

1. Calculate 4 × 0.85 = 3.4
2. Calculate 1/7 = 0.142857...
3. Calculate 5/14 = 0.357142...
4. Calculate 1 / 0.357142... = 2.8 (approximately)

Now, substitute the values back into the expression:

3.4 - 0.142857... ÷ 2.8 - 1.56 ÷ (-0.3)

Remember that dividing by a negative number is the same as multiplying by its positive reciprocal. So, -1 / (-0.3) = 3.333...

Now we have:

3.4 - 0.142857... ÷ 2.8 + 1.56 × 3.333...

Next, calculate the division and multiplication:

3.4 - 0.051020... + 5.213...

Finally, subtract the two values:

3.348979... + 5.213...

This gives you an approximate final result of 8.562...