Question

1)-15*37+14*37-19*37+17*37 2)26*45-45*27+31*45-30*45 3)-48*54:48+54*48:(-54) 4)72*38:(-72)-38*72:(-38)

Answer 1

1. -15*37+14*37-19*37+17*37= -1369

1) -15*37=-555

2) 14*37=518

3) 19*37=703

4) 17*37=629

5) -555+518= -37

6) 703+629=1332

7) -37-1332=-1369

2. 26*45-45*27+31*45-30*45=0

1) 26*45= 1170

2) 45*27= 1215

3) 31*45= 1395

4) 30*45= 1350

5) 1170-1215= -45

6) 1395-1350= 45

7) -45+45=0

3. -48*54:48+54*48:(-54)=6

1) -48*54= -2592

2) -2592:48= 54

3) 54*48=2592

4) 2592:(-54)= -48

5) 54+(-48)= 6

4. 72*38:(-72)-38*72:(-38)=34

1) 72*38=2736

2) 2736:(-72)=-38

3) 38*72=2736

4)2736:(-38)=-72

5) -38-(-72)= 34

Answer 2

Let's calculate each expression step by step:

1. -15 * 37 + 14 * 37 - 19 * 37 + 17 * 37 = (-15 + 14 - 19 + 17) * 37 = (-3) * 37 = -111

2. 26 * 45 - 45 * 27 + 31 * 45 - 30 * 45 = (26 - 27 + 31 - 30) * 45 = (0) * 45 = 0

3. -48 * 54 / 48 + 54 * 48 / (-54) = (-2592 / 48) + (2592 / -54) = (-54) + (-48) = -102

4. 72 * 38 / (-72) - 38 * 72 / (-38) = (-2736 / -72) - (-2736 / -38) = (38) - (72) = -34

So, the results of the four expressions are:

1. -111
2. 0
3. -102
4. -34