28 × (-5) ÷ 7
= -(28 × 5) ÷ 7
= -140 ÷ 7
= -(140 ÷ 7)
= -20
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28 × (-5) ÷ 7
= -(28 × 5) ÷ 7
= -140 ÷ 7
= -(140 ÷ 7)
= -20