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$$
(-2) \times (-4) \div (+8) = \\[2ex]
(-14 \div (+7)) \times (-3) = \\[2ex]
-4 \times (+3) \div (-2) = \\[2ex]
(28 \div (-4)) \times (+3) =
$$

پاسخ

$$
(-2) \times (-4) \div (+8) = (+8) \div (+8) = +1 \\[2ex]
(-14 \div (+7)) \times (-3) = (-2) \times (-3) = (+6) \\[2ex]
-4 \times (+3) \div (-2) = (-12) \div (-2) = +6 \\[2ex]
(28 \div (-4)) \times (+3) = (-7) \times (+3) = -21
$$