a) 6.2.32+12.68
=( 6.2.32)+(12.68)
=384+816
=1200
b)15:{90:[480-(135+63.5)]}
=15÷{90:[480-450]}
=15÷{90÷30}
=15÷3
=5
a) 6.2.32+12.68
= 12.32+12.68
= 12.(32+68)
= 12.100
= 1200.
b) 15:{90:[480-(135+63.5)]}
= 15:{90:[480-(135+315)]}
= 15:{90:[480-450]}
= 15:{90:30}
= 15:3
=5.
a ) 6 . 2 . 32 + 12 . 68
= 12 . 32 + 12. 68
= 12 . ( 32 + 68 )
= 12. 100
= 1200
b ) 15: { 90 : [ 480 - ( 135 + 63 . 5)]}
= 15 : { 90 : [ 480 - ( 135 + 315 )]}
= 15 : { 90 : [ 480 - 450 ]}
= 15 : { 90 : 30}
= 15 : 3
= 5