Question

tinh nhanh

a,132x99+132

b,49x13+49x7

c,(56x27+56x35):62

d,\(\frac{864x48-432x96}{864x48x432}\)

e,1+6+11+16+....+46+51

anh chi giup em voi a.

thoi han la den chieu thu 2 ngay 29/8/2016 nha.

Answer 1

132 x 99 + 132

= 132 x 99 + 132 x 1

= 132 x ( 99 + 1 )

= 132 x 100

= 13 200

Answer 2

49 x 13 + 49 x 7

= 49 x ( 13 + 7)

= 49 x 20

= 980

Answer 3

a)

132x99+132=132X100

=13200

b)

49X13+49X7=49X(13+7)

=49X20

=980

c)

(56X27+56X35):62= 56X62:62

=56

d)

864X48-432X96/864X48X432

=96/1

e)

Tổng là

[( 51-1):5+1]X(51+1):2=286