Question

TÍNH BẰNG CÁCH THUẬN TIỆN 

45,28+52,17-15,28-12,17

Answer 1

45,28+52,17-15,28-12,17

=(45,28-15,28)+(52,17-12,17)

=30+40

=70

Answer 2

45,28 + 52,17 - 15,28 - 12,17

= (45,28 - 15,28) + (52,17 - 12,17)

= 30 + 40

= 70

Answer 3

\(45,28+52,17-15,28-12,17\)

\(=\left(45,28-15,28\right)+\left(52,17-12,17\right)\)

\(=30+40\)

\(=70\).OK

Answer 4

=45,28+15,28-52,17-12,17

=60,56-40

=20,56

Answer 5

45,28+52,17-15,28-12,17

=(45,28-15,28)+(52,17-12,17)

=30+40

=70

Answer 6

\(45,28+52,17-15,28-12,17\)

\(=\left(45,28-15,28\right)+\left(52,17-12,17\right)\)

\(=30+40\)

\(=70\)