Question

(4,3+2,4:8)×3 280,8:12-0,3×24 (17,6×13-41,6):12

Answer 1

(4,3+2,4:8)×3= (4.3+0.3)*3=4.6*3=13.8
280,8:12-0,3×24=23.4-7.2=16.2
(17,6×13-41,6):12=(228.8-41.6):11=187.2:12=15.6

Answer 2

Let's break this down into smaller parts and solve them step by step:

1. (4,3+2,4:8) First, let's simplify the expression inside the parentheses: 4,3+2,4:8 = 4,5,0.5 This is a comma-separated list of three numbers: 4, 5, and 0.5.

2. (4,3+2,4:8)×3 Now we need to multiply each number in the list by 3: 4×3, 5×3, 0.5×3 = 12, 15, 1.5 So the result of this expression is a comma-separated list of three numbers: 12, 15, and 1.5.

3. 280,8:12 The expression 8:12 represents a range of numbers from 8 to 12, inclusive. So we can rewrite this as: 280, 8, 9, 10, 11, 12

4. 280,8:12-0,3×24 Now we need to multiply 0.3 by 24 and subtract the result from each number in the list: 280 - (0.3×24), 8 - (0.3×24), 9 - (0.3×24), 10 - (0.3×24), 11 - (0.3×24), 12 - (0.3×24) = 272.4, 0.4, 1.4, 2.4, 3.4, 4.4 So the result of this expression is a comma-separated list of six numbers: 272.4, 0.4, 1.4, 2.4, 3.4, and 4.4.

5. (17,6×13-41,6):12 First, let's simplify the expression inside the parentheses: 17, 6×13 - 41.6 = 17, 78.4 Now we need to divide each number in the list by 12: 17 ÷ 12, 78.4 ÷ 12 = 1.416666..., 6.533333... So the result of this expression is a comma-separated list of two numbers: 1.416666... and 6.533333....

Putting it all together, we have: 12, 15, 1.5 × 272.4, 0.4, 1.4, 2.4, 3.4, 4.4 × 1.416666..., 6.533333... We can simplify this by multiplying the three lists together: [12×272.4×1.416666..., 12×272.4×6.533333..., 15×272.4×1.416666..., 15×272.4×6.533333..., 1.5×272.4×1.416666..., 1.5×272.4×6.533333..., 12×0.4×1.416666..., 12×0.4×6.533333..., 15×0.4×1.416666..., 15×0.4×6.533333..., 1.5×0.4×1.416666..., 1.5×0.4×6.533333..., 12×1.4×1.416666..., 12×1.4×6.533333..., 15×1.4×1.416666..., 15