Question

bài1 tính bằng cách thuân tiên nhất

a) 4 x 7 x 5        c) 25 x 895 x 4

b) 15 x 9 x 2      d) 2 x 3238 x 50

 

Answer 1

a) 4x7x5

=(4x5)x7

=20x7

=140

b) 15x9x2

=(15x2)x9

=30x9

=270

c) 25x895x4

=(25x4)x895

=100x895

=89500

d) 2x3238x50

=(2x50)x3238

=100x3238

=323800

tk nhé

Answer 2

ui avatra idol tui

Answer 3

25x(-5)x7x(-4)x2=?

Answer 4

25x(-5)x7x(-4)x2=?

Answer 5

4 x 347 x 25

Answer 6

a) 4 x 7 x 5

=(4x5)x7

=20x7

140

b)15x9x2

=(15x2)x9

=30x9

=270

c)25x895x4

=(25x4)x895

=100x895

=89500

tk nhé