Առաջադրանքներ 2

638. -4 x 7 = -28
-11 x -5 = 55
8 x -2 = -16
-12 x 12 = -144

639. 9 x (-2 x 3) = -54
-5 x (4 x 7) = -140
-6 x (-10 x 8) = 480
5 x (-8 x -5) = 200
2 x (15 x -6) = -180
-16 x (-3 x (-9)) = -432

640. -5 ((-6) + (-11)) = 85
0 x (-8 + 12) = 0
2 x (-10 + 7) = -6
8 x (0 + (-17)) = -136
-6 x (-1 + (-19)) = 120

641. ա) 42
բ) -1
գ) -120
դ) 504

643. Ոչ

645. Ոչ

647. ա) -1
բ) -4200
գ) 12800
դ) 945

651. ա) +
բ) –
գ) –

656. ա) |-4| = 4
բ) 2 x |-4| = 8
գ) |0| = 0
դ) -|+1| = -1

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