12,78 + 435,81+ 89 + 64,19 + 11 + 87,22 =?
tính nhanh
12,78 + 435,81 + 89 + 64,19 + 11 + 87,22
12,78 + 435,81 + 89 + 64,19 + 11 + 87,22
= (12,78 + 87,22) + (435,81 + 64,19) + 89
= 100 + 500 + 89
= 600 + 89
= 689
12,78 x 0,0001
đặt tính 12,78 : 0.25 ; 8,424 : 3,24
đặt tính 12,78 : 0.25 ; 8,424 : 3,24
59.(11-89)-89.(-59+11)
<,>,=
a) 68+11*205 68*11+205
b) 89*11+715 89+11*715
a) 68 + 11 x 205 .... 68 x 11 + 205
= 2323 > 953
Vậy 68 + 11 x 205 > 68 x 11 + 205
b) 89 x 11 + 715 .... 89 + 11 x 715
= 1694 < 7954
Vậy 89 x 11 + 715 < 89 + 11 x 715
a) 68+11*205>68*11+205
b)89*11+715<89+11*715
11 x 25 + 95 x 11 + 89 x 51 + 69 x 89
11 x 25 + 95 x 11 + 89 x 51 + 69 x 89
= 11 . ( 25 + 95 ) + 89 . ( 69 + 51 )
= 11 . 120 + 89 . 120
= 120 . ( 11 + 89 )
= 120 . 100
= 12000
11 x 25 + 95 x 11 + 89 x 51 + 69 x 89
=11 x (25+95) + 89 x (51+69)
=11 x 120 + 89 x 120
=120 x (11+89)
=120 x 100
=12000
11.25+95.11+89.51+69.89=11.(25+95)+89.(51+69)
=11.120+89.120
=120.(11+89)
=120.100
=12 000
Hok tốt nha^^
(3,11+5,22+15,33+21,44)+(7,89-3,56+12,78+46,7)
(3,11+5,22+15,33+21,44)+(7,89-3,56+12,78+46,7)
= 108,91 nha bạn .
(3,11+5,22+15,33+21,44)+(7,89-3,56+12,78+46,7)
=(3,11+21,44+5,22+15,33)+(7,89-7+12,78-3,56)
=(24,55+30,55)+(0,89+9.22)
=55,1+10.11
=65,21
điền dấu >,<,=
a) 68 + 11 x 205 ... 68 x 11 + 205
b) 89 x 11 + 715 ... 89 + 11 x 715
a)68 + 11 x 205>68 x 11 + 205
b)89x11+715<89+11x715
a)68+11x205>68x11+205
b)89x11+715=89+11x715
học giỏi nha bn!
a,Vì:68 + 11 x 205 = 2323
68 x 11 + 205 = 953
Nên 68 + 11 x 205 > 68 x 11 + 205
b,Vì 89 x 11 + 715 =1154
89 + 11 x 715 = 7954
Nên 89 x 11 + 715 < 89 + 11 x 715
Học tốt nha bạn !!