Question

(20×3/7+4×21/100)-19×3/7=

Answer 1

20 × 3 = 60
60 : 7 = 8.6
4 × 21 = 84
84 : 100 = 8.4
8.4 + 4 = 12.4
19 × 3 = 57
57 : 7 = 8.1
8.4 - 8.1 = 0.3

Answer 2

(20×3/7+4×21/100)-19×3/7=1.2

Answer 3

I can help you with your math problem. Here is the detailed solution:

$$\begin{aligned} (20\times 3/7 + 4\times 21/100) - 19\times 3/7 &= \frac{60}{7} + \frac{84}{100} - \frac{57}{7} \\ &= \frac{600}{70} + \frac{588}{700} - \frac{570}{70} \\ &= \frac{1188}{700} - \frac{570}{70} \\ &= \frac{1188}{700} - \frac{5700}{700} \\ &= -\frac{4512}{700} \\ &\approx -6.4457 \end{aligned}$$

The final answer is -6.4457. I hope this helps.Ответь+подробно.+(20×3/7+4×21/100)-19×3/7=