Question

1) 47,6*09-8,2*4,9 2)9*(0,001+0,999)*(6*0,7-3)-7 3)42:0,35-3,24:5,4-7:56+2,8:0,56​

Answer 1

Ответ:

Пошаговое объяснение:

1) 47,6*0,9-8,2*4,9=2,66

1. 47,6*0,9=42,84
2. 8,2*4,9=40,18
3. 42,84-40,18=2,66

2) 9*(0,001+0,999)*(6*0,7-3)-7 =3,8

1. 0,001+0,999=1
2. 6*0,7=4,2
3. 4,2-3=1,2
4. 9*1=9
5. 9*1,2=10,8
6. 10,8-7=3,8

3) 42:0,35-3,24:5,4-7:56+2,8:0,56​=124,275

1) 42:0,35=120

2)3,24:5,4=0,6

3)7:56=0,125

4)2,8:0,56​=5

5)120-0,6=119,4

6)119,4-0,125=119,275

7)119,275+5=124,275

Answer 2

Let's solve each of these mathematical expressions step by step:

1. 47.6 * 0.9 - 8.2 * 4.9

First, multiply the numbers: 47.6 * 0.9 = 42.84 8.2 * 4.9 = 40.18

Now, subtract these results: 42.84 - 40.18 = 2.66

2. 9 * (0.001 + 0.999) * (6 * 0.7 - 3) - 7

First, calculate the values inside the parentheses: 0.001 + 0.999 = 1 6 * 0.7 = 4.2

Now, calculate the expression inside the second set of parentheses: 1 * 4.2 - 3 = 4.2 - 3 = 1.2

Finally, multiply by 9 and subtract 7: 9 * 1.2 - 7 = 10.8 - 7 = 3.8

3. 42 / 0.35 - 3.24 / 5.4 - 7 / 56 + 2.8 / 0.56

Let's solve this step by step:

42 / 0.35 = 120 3.24 / 5.4 = 0.6 7 / 56 = 0.125 2.8 / 0.56 = 5

Now, perform the operations:

120 - 0.6 - 0.125 + 5 = 119.275

So, the final result is 119.275 for the third expression.