Question

306*24:72-(35280:7-63*80):97=?                (2005*8-704*21+6400:800):(702*860-603704)=?

Answer 1

1)102
2)16040-14784+8=1264

Answer 2

Let's solve each expression step by step:

1. $306 \times 24$: This equals 7344.

2. $72 - \left(\frac{35280}{7} - 63 \times 80\right)$: We perform the calculations within the parentheses first. $\frac{35280}{7} - 63 \times 80 = 5040 - 5040 = 0$ Now we substitute this value back into the main expression: $72 - 0 = 72$

3. $7344 - 72$: Subtracting 72 from 7344 gives us 7272.

4. $7272 \div 97$: Dividing 7272 by 97 gives us approximately 75.0515.

Therefore, $306 \times 24:72 - (35280:7 - 63 \times 80):97$ is approximately equal to 75.0515.

Now, let's move on to the second expression:

1. $(2005 \times 8 - 704 \times 21 + \frac{6400}{800}) : (702 \times 860 - 603704)$: Let's perform the calculations step by step within the parentheses: $2005 \times 8 = 16040$ $704 \times 21 = 14784$ $\frac{6400}{800} = 8$ $702 \times 860 = 604920$ $604920 - 603704 = 1216$ Now we substitute these values back into the main expression: $16040 - 14784 + 8 : 1216$

2. $16040 - 14784$: Subtracting 14784 from 16040 gives us 1256.

3. $8 : 1216$: Dividing 8 by 1216 gives us approximately 0.0066.

4. $1256 + 0.0066$: Adding 0.0066 to 1256 gives us approximately 1256.0066.

Therefore, $(2005 \times 8 - 704 \times 21 + \frac{6400}{800}) : (702 \times 860 - 603704)$ is approximately equal to 1256.0066.