please answer these questions with explanation
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please mark as brainlist
it took too much time
it is not copied
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(1) -6.3 - 6.6 = -12.9
(2) -3.16 + 6.90 + (-4.98) + (-1.78)
= -3.16 + 6.90 - 4.98 - 1.78
= 6.90 - 3.16 - 4.98 - 1.78
= 6.90 - 9.90
= -3
(3) 0.5 × 0.01 × 0 = 0
(4) 0.5 × 0.02 × 0.4
= 0.010 × 0.4
= 0.040 or 0.04
(5) 0.6 × (-0.6)
= -0.36
Step-by-step explanation:
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