Question

80*70-65= столбик 20*70-65= столбик 8*70-65 = столбик 2*70-65= столбик 6*70-65= столбик 4*70-65= столбик

Answer 1

" * " это умножить ?

Answer 2

Sure, I can help you solve these equations step by step using the column method:

1. 80 * 70 - 65 =

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  80
x 70
-----

Multiply the units digits: 0 * 5 = 0. Write 0 in the units column.

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  80
x 70
-----
   0

Multiply the tens digits: 7 * 0 = 0. Write 0 in the tens column.

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  80
x 70
-----
   00

Multiply 7 (tens digit of the first number) by 80:

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  80
x 70
-----
 5600

Now subtract 65 from the result:

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  80
x 70
-----
 5600
-  65
-----
 5535

2. 20 * 70 - 65 = We can follow the same steps as above:

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  20
x 70
-----

Multiply the units digits: 0 * 5 = 0. Write 0 in the units column.

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  20
x 70
-----
   0

Multiply the tens digits: 7 * 0 = 0. Write 0 in the tens column.

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  20
x 70
-----
   00

Multiply 2 (tens digit of the first number) by 70:

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  20
x 70
-----
 1400

Now subtract 65 from the result:

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  20
x 70
-----
 1400
-  65
-----
 1335

3. 8 * 70 - 65 =

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  8
x 70
-----

Multiply the units digits: 0 * 5 = 0. Write 0 in the units column.

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  8
x 70
-----
   0

Multiply the tens digits: 7 * 0 = 0. Write 0 in the tens column.

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  8
x 70
-----
   00

Multiply 0 (tens digit of the first number) by 8:

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  8
x 70
-----
    0

Now subtract 65 from the result:

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  8
x 70
-----
    0
-  65
-----
  -65

4. 2 * 70 - 65 =

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  2
x 70
-----

Multiply the units digits: 0 * 5 = 0. Write 0 in the units column.

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  2
x 70
-----
   0

Multiply the tens digits: 7 * 0 = 0. Write 0 in the tens column.

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  2
x 70
-----
   00

Multiply 0 (tens digit of the first number) by 2:

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  2
x 70
-----
     0

Now subtract 65 from the result:

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  2
x 70
-----
     0
-   65
-----
   -65

5. 6 * 70 - 65 =

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  6
x 70
-----

Multiply the units digits: 0 * 5 = 0. Write 0 in the units column.

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  6
x 70
-----
   0

Multiply the tens digits: 7 * 0 = 0. Write 0 in the tens column.

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  6
x 70
-----
   00

Multiply 0 (tens digit of the first number) by 6:

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  6
x 70
-----
      0

Now subtract 65 from the result:

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  6
x 70
-----
      0
-   65
-----
    -65

6. 4 * 70 - 65 =

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  4
x 70
-----

Multiply the units digits: 0 * 5 = 0. Write 0 in the units column.

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  4
x 70
-----
   0

Multiply the tens digits: 7 * 0 = 0. Write 0 in the tens column.

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  4
x 70
-----
   00

Multiply 0 (tens digit of the first number) by 4:

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  4
x 70
-----
       0

Now subtract 65 from the result:

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  4
x 70
-----
       0
-   65
-----
     -65

So, the results are:

1. 80 * 70 - 65 = 5535
2. 20 * 70 - 65 = 1335
3. 8 * 70 - 65 = -65
4. 2 * 70 - 65 = -65
5. 6 * 70 - 65 = -65
6. 4 * 70 - 65 = -65