Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(86,72+9,8-12,73+10,2-7,27\)
\(\text{=}86,72+\left(9,8+10,2\right)-\left(12,73+7,27\right)\)
\(\text{=}86,72+20-20\)
\(\text{=}86,72+\left(20-20\right)\)
\(\text{=}86,72\)
86,72 + 9,8 - 12,73 + 10,2 - 7,27
= 86,72 - ( 9,8 + 10,2) - ( 12,73 + 7,27 )
= 86,72 - 20 - 20
= 46 , 7286,7 + 9,8 - 12,73 + 10,2
= ( 86,7 -12,73) + ( 9,8 + 10,2)
= 73,97 + 20
= 93,97
45,82 x 9 - 45,82 x 2,5 x 2 + 15, 82
= 45,82 x 9 - 45,82 x 5 + 15,82
= 45,82 x (9-5) + 15,82
= 45,82 x 4 + 15,82
= 183,28 + 15,82
= 199,1
a) = 36,4x9+36,4x1
=36,4x(9+1)
=36,4x10
=364
b) (8,27-7,27)+(7,16-6,16)+(9,33-8,33)
=1+1+1
=3
a. 36,4 x 9 + 36 + 0,4= 36,4 x 9 + 36,4
=36,4 x ( 9 + 1 )
= 36,4 x 10 = 364
b. ( 8,27 + 7,17 + 9,33 ) - ( 7,27 + 6,16 + 8,33 )
= ( 8,27 - 7,27 ) + ( 7,17 - 6,16 ) + ( 9,33 - 8,33 )
= 1 + 1 + 1
= 3
12,75 - 7,27 - 1,72 - 0,01
=12,75 - (7,27 + 1,72 + 0,01)
=12,75 - 9
=3,75
( 8,27 + 7,16 + 9,333 ) - ( 7,27 + 6,17 + 8,33 )
= 8,27 + 7,16 + 9,333 - 7,27 - 6,17 - 8,33
= ( 8,27 - 7,27 ) + ( 7,16 - 6,17 ) + ( 9,333 - 8,33 )
= 1 + 0,99 + 1,003
= 1,99 + 1,003
= 2,993
1,27+2,77+4,27+5,77+7,27+8,77+10,27+11,77+13,27+14,77
= (1,27 + 14,77) + (2,77 + 13,27) + (4,27 + 11,77) + (5,77 + 10,27) + (7,27 + 8,77)
= 16 + 16 + 16 + 16 + 16 = 16*5 = 80
\(1,27+2,77+4,27+5,77+7,27+8,77+10,27+11,77+13,27+14,77\)
\(=4,04+10,04+16,04+22,04+28,04\)
\(=\left(4+10+16+22+28\right)+\left(0,04\times5\right)\)
\(=20+10+50+0,2\)
\(=80+0,2=80,2\)
đúng thì k nha
ta có (1,27+14,77) + (2,77+13,77) + (4,27 + 11,77) + (7,27+8,770 )+ 10,27
=(16,04 + 16,04 )+ (16,04+16,04) + 10,27
=(32,08+ 32,08 )+ 10,27
= 64,16 + 10,27
=74,43
( 8,27 + 9,33 + 7,16 ) - ( 7,27 + 8,33 +6,16 )
= (17,60 + 7,16 ) - ( 16,60 + 6,16 )
= 24 , 76 - 22 , 76
= 2
( 8,27 + 7,16 + 9,33 ) - ( 7,27 + 6,16 + 8,33 )
= (8,27 + 9,33 + 7,16) - (7,27 + 8,33 + 6,16)
= (17,6 + 7,16) - (15,6 + 6,16)
= 24,76 - 21,76
= 3
= 115,8 + 1,125 - 12,73 + 10,2 - 7,27
=(115,8 + 10,2) + (-12,73 - 7,27) + 1,125
=126 -20 + 1,125
=107,125