1. 3*(-1)
2.(-21)*(-30)
3. (-15)*0*(-18)
4.9*(-3)*(-6)
5.(-1)*(-2)*(-3)*4
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1. 3*(-1) = -3
2.(-21)*(-30) = 630
3. (-15)*0*(-18) = 0
4.9*(-3)*(-6) = 162
5.(-1)*(-2)*(-3)*4 = -24
One of the people got across and then he sent another man who was waiting on the other side to get here, and then that another man gave boat to the second man to get across, so that's how the two people got across.
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