Question

a)     205 – [1200 – (4² – 2.3)³] : 40

b)     177 :[2.(4² – 9) + 3²(15 – 10)]

c)     [(25 – 2².3) + (3².4 + 16)]: 5

d)     125(28 + 72) – 25(3².4 + 64)

500 – {5[409 – (2³.3 – 21)²] + 10³} : 15

Answer 1

a)     205 – [1200 – (4² – 2.3)³] : 40

= 205 – [1200 – ( 16 - 6 )³  ] : 40

= 205 – [1200 – ( 10 )³  ] : 40

= 205 – [1200 – 1000 ] : 40

= 205 – 200 : 40

= 205 – 50

= 155

Answer 2

b)     177 :[2.(4² – 9) + 3²(15 – 10)]

= 177 :[2.(16 – 9) + 9. 5]

= 177 :[2.7 + 9. 5]

= 177 :[ 14 + 45 ]

= 177 : 59

= 3

Answer 3

a) 205 - [ 1200 - ( 4

Answer 4

a)     205 – [1200 – (4² – 2.3)³] : 40

= 205 - [1200-(16-6)³]

= 205-[1200-1000]

=205-200

=5

b)     177 :[2.(4² – 9) + 3²(15 – 10)]

=177:[2.(16-9)+9.5]

=177:[2.7+45]

=177:[14+45]

=177:59

=3

c)     [(25 – 2².3) + (3².4 + 16)]: 5

= [(25-4.3)+(9.4+16)]:5

= [(25-12)+(36+16)]:5

= [(13+52)]:5

=65:5

=13

d)     125(28 + 72) – 25(3².4 + 64)

500 – {5[409 – (2³.3 – 21)²] + 10³} : 15

=125.100-25.(9.4+64).500-{5.[409-(8.3-21)²]+1000}:15

=125.100-25.100.500-{5.[409-3²]+1000}:15

=(125-25).100-{5.400+1000}:15

=100.100-{2000+1000}:15

=10000-3000:15

=10000-200

=9800