Доброе утро всем.

285×3-408+254:2

1) 253×3 = 759
×253
3
____
759

2) 254:2 = 127
- 254 | 2
254 __
___ 127
0

3) 759-408 = 351
-759
408
____
351

4) 351+127 = 478
+351
125
____
478
ответ: 478

159×5-241×3+37×9

1) 159×5 = 795
×159
5
____
795

2) 241×3 = 723
×241
3
____
723

3) 37×9 = 333
×37
9
____
333

4) 795-723= 72
-795
723
____
72

5) 72+333 = 405
+333
72
____
405

ответ: 405

800-294:3+196:7

1) 294:3 = 98
-294 | 3
294 __
___ 98
0

2) 196:7 = 28
-196 | 7
196 __
___ 28
0

3) 800-98 = 702
-800
98
____
702

4) 702+28 = 730
+702
28
____
730

ответ: 730

325×3-324:9×6

1) 325×3 = 975
×325
3
____
975

2) 324:9 = 36
-324 | 9
324 __
___ 36
0
3) 36×6= 216
×36
6
____
216

4) 975-216 = 759
-975
216
____
759

ответ: 759