Solve using properties.
a)134 X 99
b)36 X -101
c) -145 X -205
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Step-by-step explanation:
1) 134 × 99
= 134 × (100 - 1)
=( 134×100 )-(134×1)
= 13400 - 134
= 13,266
2) 36 × (-101)
= 36 × (-100 -1)
= [36×(-100)] - [36×(-1)]
= -3600 - (-36)
= -3600 + 36
= -3,636
3) -145 × (-205)
= -145 × [-200 - 5 ]
= [-145 × (-200)] - [-145 × 5]
= 29000 +725
= 29,725
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