Вычислить по действиям:

820 * (7146+12854) =

(1648276-693276) : 500=

3000000: (702319-697319) =

2*3*40*50:12=

2520000:2:9:50:700:4=

4*5*678*800:400:20:1356=

820 * (7146+12854) = 16400000.

1. 7146+12854=20000.

2.20000*820=16400000.

(1648276-693276) : 500=1910.

1.1648276-693276=955000.

2.955000:500=1910.

3000000: (702319-697319) = 600.

1.702319-697319=5000.

2.3000000:5000=600.

2*3*40*50:12=100.

1.2*3=6.

2.6*40=240.

3.240*50=1200.

4.1200:12=100.

2520000:2:9:50:700:4=1.

1.2520000:2=1260000.

2.1260000:9=140000.

3.140000:50=2800.

4.2800:700=4.

5.4:4=1.

4*5*678*800:400:20:1356=1.

1.4*5=20.

2.20*678=13560.

3. 13560*800=10848000.

4.10848000:400=27120.

5.27120:20=1356.

6. 1356:1356=1.

1. 7146+12854=20000

2.20000*820=10547420

...

1. 1648276-693276=955000

2.955000:500=1910

...

1. 702319-697319=5000

2. 3000000:5000=6000

...

1.2520000:2=1260000

2.1260000:9=140000

140000:50=2800

2800:700=4

4:4=1

...

1. 2*3=6

2.6*40=240

3. 240*50=12000

4.12000:12=1000

...

1.5*4=20

2.20*678=13560

3. 13560*800=10848000

4. 10848000:4000=27120

5. 27120:20=1356

6. 1356 - 1356=1

Как то так