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A. -4
B. 3
C. -1
D. 7.74
2. -=-=-=
A. X = 5
B. X = -5
C. X = 125
D. X = 9
3. ______
A. 16
B. 6
C. 4
D. 9
4. +++++++
70.000 x 4 = 280.000
X = 280.000 - 90.000
X = 190.000
5. +-+-+-+
13 x 9 = 117
13 + 9 = 22
13 - 9 = 4