a)103-3·(5+2³)=103-3·(5+8)=103-3·13=103-39=64
b)(140+73):3+7=(213:3)+7=71+7=78
c)16·5+150:30=80+5=85
d)[800:400+(75-39)]·2=[2+36]·2=38·2=76
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a)103-3·(5+2³)=103-3·(5+8)=103-3·13=103-39=64
b)(140+73):3+7=(213:3)+7=71+7=78
c)16·5+150:30=80+5=85
d)[800:400+(75-39)]·2=[2+36]·2=38·2=76