Fill in the missing number:
(−3)⋅⬜=−15 (-3)\cdot⬜=-15 (−3)⋅⬜=−15
Let's remember the rule:
(−x)×(+x)=−x (-x)\times(+x)=-x (−x)×(+x)=−x
Let's think about what number we need to multiply by 3 to get 15:
3×5=15 3\times5=15 3×5=15
Now let's put the numbers together with the appropriate sign as written in the rule above as follows:
−3×(+5)=−15 -3\times(+5)=-15 −3×(+5)=−15
5 5 5