Question

bài tính nhanh. 64x4+18x4+9x8

Answer 1

Tham Khảo :

Answer 2

= 32 x 8 + 9 x 8+9 x 8

= 8 x (32 + 9 + 9)= 8 x 50= 400

Answer 3

=64.4+18.4+18.4

=(64+18+18).4

=100.4

=400

Answer 4

`64xx4+18xx4+9x8`

`=(64+18)xx4+9xx8`

`=82xx4+9xx8`

`=328+72`

`=400`

Answer 5

64 x 4 + 18 x 4 + 9 x 8

= 4 x (64 + 18 + 18)

= 4 x 100

= 400

Answer 6

64x4+18x4+9x8

=64.4+18.4+18.4

=(64+18+18).4

=100.4

=400

Answer 7

=64.4+18.4+18.4

=(64+18+18).4

=100.4

=400