3 )
(145.99+145)-(143.101-143)
= 145. (99+1 ) - 143. (101-1)
= 145. 100 - 143.100
= (145 - 143).100
= 2. 100= 200
___
5 ) 113. (36+62) - 13 . (62 + 36)
= 113. 100 - 13.100
= (113-13).100
=100.100
= 10 000
___
6 ) 48 . 57 + 52 . 71 + 48 .43 + 52 .59
= 48. (57+43) + 52. (71+59)
= 48.100 + 52.130
= 4800 + 6760
= 11560