Question

tính nhanh:

(145 x 99 +145) - (143 x 101 - 143)

Answer 1

Đề:.............

= 145 x (99 + 1) - 143 x (101 - 1)

= 145 x 100 - 143 x 100

= 14500 - 14300

= 2

Answer 2

(145x99+145)-(143x101-143)

=145x(99+1)-143(101-1)

=145x100-143x100

=14500-14300=200

Answer 3

= 145 x (99 + 1) - 143 x (101 - 1)

= 145 x 100 - 143 x 100

= 14500 - 14300

= 2