7) -1911 -(1234-1911)
= - 1911 - 1234 + 1911
= (1911 - 1911) - 1234
= - 1234
8) 156.72 +28.156
= 156.(72 + 28)
= 156.100
= 15600
9) 32.(-39) + 16.(-22)
= 16.2.(-39) + 16.(-22)
= 16 . [2.(-39) + (-22)]
= 16 . [-78 - 22]
=16.(-100)
= -1600
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10) - 1945 - (567 - 1945)
= - 1945 -567 +1945
= (1945 - 1945) - 567
= -567
11) 184 . 33 + 67.184
=184.(33+67)
=184.100
=18400
12) 44.(-36) + 22 . (-28)
=22.2.(-36)+22.(-28)
=22.(2.(-36) +(-28))
= 22 . (-72-28)
= 22 . (-100)
= -2200
7, -1911-(1234-1911)
= -1911-1234+1911
= (-1911+1911)-1234
= 0 - 1234
= -1234
8, 156.72+28.156
= 156. (72+28)
= 156.100
= 15600
9, 32.(-39)+16.(-22)
= 16.2.(-39)+16.(-22)
= 16.(-78)+16.(-22)
= 16.((-78)+(-22))
= 16.(-100)
= -1600
10, -1945-(567-1945)
= -1945-567+1945
= (-1945+1945)-567
= 0 - 567 = -567
11, 184.33+67.184
= 184.(33+67)
= 184 . 100
= 18400
12, 44.(-36)+22.(-28)
= 22.2.(-36)+22.(-28)
= 22.(-72)+22.(-28)
= 22. (-100)
= -2200