Question

tinh banh cach thuan tien:

a)10+30+70+90.10.10

b)10.40+60.10+250

c)25.2+25.8.10

Answer 1

a. 10+30+70+90.10.10

=(10+90)+(30+70).10.10

=100+100.10.10

=200.10.10

=20000

b. 10.40+60.10+250

=400+600+250

=1000+250

=1250

c. 25.2+25.8.10

=50+200.10

=50+2000

=2050

k mk nhe

mk lại thùy linh 6 d đấy

Answer 2

a) 10 + 30 + 70 + 90 . 10 . 10

= 10 + (30 + 70) + 9000

= 10 + 100 + 9000

= 9110

b) 10 . 40 + 60.10 + 250

= 10 . (40 + 60) + 250

= 10 . 100 + 250

= 1000 + 250

= 1250

c) 25 .2 + 25.8.10

= 25.(2 + 8).10

= 25.10.10

=250.10

= 2500

k cho tớ nha

Answer 3

minh ko biet xin loi ban nha

minh ko biet xin loi ban nha

minh ko biet xin loi ban nha

Answer 4

dap an la 

cau a:9110

cau b:1250

cau c :2500

cau a:9110

cau b:1250

cau c :2500

cau a:9110

cau b:1250

cau c :2500

Answer 5

c) 25.2 + 25.8.10

= 25.2 + 25.80

= 25.(80 + 2)

= 25.82

= 1050