tính nhanh
(15+21)+(25-15-35-21)
(25+51)+(42-25-53-51)
Tính nhanh
13.58.4 + 32.26.2+52.10
15.34.4+120.21+21.5.12
14.35.5+10.25.7+20.70
24.( 15+49)+12.(50+42)
53.(51+4)+53.(49+96)+53
42.(15+96)+6.(25+4).7
45.(13+78)+8.(53+25).2
cọu lên gg í <<:
tính nhanh (25+51)+(42-25-53-51)
(25+51)+(42-25-53-51)=25+51+42-25-53-51=42-53=-11
Tính nhanh :
(25+51)+(42-25-53-51)
BÀi 1 : Tính nhanh: (25 + 51) + (42 − 25 − 53 − 51).
= 25 + 51 + 42 - 25 - 53 - 51
= (25-25) +( 51 -51) +42-53
= 0+0+42-53 =-11
ai tick mình cho tròn 205 với
Tính nhanh
(25+51)+(42-25-53-51)
( 25 + 51 ) + ( 42 - 25 - 53 - 51 )
= 25 + 51 + 42 - 25 - 53 - 51
= (25 - 25) + (51- 51) + (42 - 53)
= -11
mình nhầm
(25+51)+(42-25-53-51)
=25+51+42-25-53-51
=(25-25)+(51-51)+(42-53)
=-8
chúc bạn học tốt
tính nhanh nhé
7) 53(51+4)+53(49+96)+53
8)42(15+96)+6(25+4).7
9) 45(13+78)+9(87+22).5
10) 16(27+75)+8(53+25).2
7)
53.(51+4)+53.(49+96)+53
=53.55+53.145+53
=53.(55+145+1)
=53.201
=10653
8)
42.(15+96)+6.(25+4).7
=42.111+(6.7).29
=42.111+42.29
=42.(111+29)
=42.140
=5880
9)
45.(13+78)+9.(87+22).5
=45.91+(9.5).109
=45.91+45.109
=45.(91+109)
=45.200
=9000
10)
16.(27+75)+8.(53+25).2
=16.102+(8.2).78
=16.102+16.78
=16.(102+78)
=16.180
=2880
7)
53.(51+4)+53.(49+96)+53
=53.55+53.145+53
=53.(55+145+1)
=53.201
=10653
8)
42.(15+96)+6.(25+4).7
=42.111+(6.7).29
=42.111+42.29
=42.(111+29)
=42.140
=5880
9)
45.(13+78)+9.(87+22).5
=45.91+(9.5).109
=45.91+45.109
=45.(91+109)
=45.200
=9000
10)
16.(27+75)+8.(53+25).2
=16.102+(8.2).78
=16.102+16.78
=16.(102+78)
=16.180
=2880
Tính nhanh: (25 + 51) + (42 − 25 − 53 − 51).
giải đầy đủ nhé
Tính nhanh:
(25+51)+(42-25-53-51)
Phá ngoặc được
25+51+42-25-53-51
=42-53
=-11
hok tốt
( 25 + 51) + ( 42 - 25 -53 -51 )
= 76 + ( - 87 )
= - 11
(25+51)+(42-25-53-51)
=(25-25)+(51-51)+(53-42)
= 0 + 0 +11
= 11
1 . Tính nhanh
a/ 15 . ( 27 + 18 + 6 ) + 15 . ( 23 + 12 )
b/ 14 . 35 . 5 + 10 . 25 .7 + 20 . 70
c/ 53 . ( 51 + 4 ) + 53 . ( 49 + 96 ) + 53
d/ 46 . ( 27 + 75 ) + 8 . ( 58 + 25 ) . 2
a) 15 . (27 + 18 + 6 ) + 15 . ( 23 +12 ) = 15. 51 + 15 . 35 = 765 + 525 = 1290
b) 14 . 35 . 5 + 10 . 25 . 7 + 20 . 70 = 2450 + 1750 + 1400 = 2452450
c) 53 . ( 51 + 4 ) + 53 . ( 49 + 96 ) + 53 = 53 . 55 + 53 . 145 + 53 = 2915 . 7685 = 22401775
d) 46 . ( 27 +75 ) +8 . ( 58 + 25 ) + 8 . ( 58 + 25 ) . 2 = 46 . 102 + 8 . 83 + 8 . 83 = 4692 + 664 + 664 = 6020