Question

1. Tinh nhanh

28.34+68.86

Dau cham la nhan nhe.mong cac ban giup minh.cam on

Answer 1

Ta có : 28.34 + 68.86

<=> 28.34 + 2.34.86

<=> 28.34 + 172.34

<=> 34.(28+172)

<=> 34.200 = 6800

Answer 2

hình như sai đề bạn nhé

Answer 3

Ta có : 28.34 + 68.86

<=> 28.34 + 2.34.86

<=> 28.34 + 172.34

<=> 34.(28+172)

<=> 34.200 = 6800

Answer 4

28.34+68.86=28.34+34.2.68=28.34+34.136=34.(28+136)=34.164=5576

Answer 5

=14.(2.34)+68.86

=14.68+68.86

=68.(14+86)

=68.100 =6800

Answer 6

28.34+68.86

=28.34+34.2.86

=28.34+34.172

=34.(28+172)

=34.200

=6800

Answer 7

6800 hoac 5576 nhé

Answer 8

Ta có : 28.34 + 68.86

<=> 28.34 + 2.34.86

<=> 28.34 + 172.34

<=> 34.(28+172)

<=> 34.200 = 6800

Answer 9

Ta có : 28.34 + 68.86

<=> 28.34 + 2.34.86

<=> 28.34 + 172.34

<=> 34.(28+172)

<=> 34.200 = 6800

Đáp số : 6800

Answer 10

Ta có : 28.34 + 68.86

<=> 28.34 + 2.34.86

<=> 28.34 + 172.34

<=> 34.(28+172)

<=> 34.200 = 6800

Đáp số : 6800

Answer 11

Ta có : 28.34 + 68.86

<=> 28.34 + 2.34.86

<=> 28.34 + 172.34

<=> 34.(28+172)

<=> 34.200 = 6800

Answer 12

Ta có : 28.34 + 68.86

<=> 28.34 + 2.34.86

<=> 28.34 + 172.34

<=> 34.(28+172)

<=> 34.200 = 6800