Question

-39(5-99)+ 99(10 - 39)

-38(25 - 4)+25(-4 + 38)

Answer 1

-39(5 - 99) + 99(10 - 39)

= -39.5 + 39.99 + 99.10 - 99.39

= (-39.5 + 99.10) + (39.99 - 99.39)

= 5.(-39 + 99.2)

= 5.159

= 795

-38(25 - 4) + 25(-4 + 38)

= -38.25 + 38.4 - 25.4 + 25.38

= (-38.25 + 25.38) + (38.4 - 25.4)

= 4(38 - 25)

= 4.13

= 52

Answer 2

- 39(5 - 99) + 99(10 - 39)

= -39.5 + 39.99 + 99.10 - 99.39

= (-39.5 + 99.10) + (39.99 - 99.39)

= 5.(-39 + 99.2)

= 5.159 = 795

- 38(25 - 4) + 25(-4 + 38)

= -38.25 + 38.4 - 25.4 + 25.38

= (-38.25 + 25.38) + (38.4 - 25.4)

= 4(38 - 25)

= 4.13 = 52