Question

1. Calcule

a) 50- {15+[4²÷(√100-2)+5×3]}

b) 60- {15+[4²÷(√100-2)+5×2]}

c) 50- {15+[4²÷(√100-2)+5×2]}

Answer 1

a) 50- {15+[4²÷(√100-2)+5×3]} =

50- {15+[4²÷( 10 - 2 ) + 15]} =

50- {15+[ (4×4) ÷ 8 + 15]} =

50- {15+[ 16 ÷ 8 + 15]} =

50- {15+[ 2 + 15]} =

50- {15+ 17 } =

50- { + 32 } =

50 - 32 = 18

b) 60- {15+[4²÷(√100-2)+5×2]} =

60- {15+[4²÷( 10-2 )+10]} =

60- {15+[ (4×4 )÷ 8+10]} =

60- {15+[ 16 ÷ 8+10]} =

60- {15+[ 2 +10]} =

60- {15+[ + 12 ]} =

60- {15+ 12 } =

60 - { + 27 } =

60 - 27 = 33

c) 50- {15+[4²÷(√100-2)+5×2]} =

50- {15+[4²÷( 10 - 2 )+ 10 ]} =

50- {15+[ (4×4 ) ÷ 8 + 10 ]} =

50- {15+[ 16 ÷ 8 + 10 ]} =

50- {15+[ 2 + 10 ]} =

50- {15+[ + 12 ]} =

50- {15+ 12 } =

50- { + 27 } =

50 - 27 = 23