Tinh nhanh
3,265+ 4,572 + 2,735 +1,428
=
=
=58
(10,38 +12,58 +14,68 )-(0,38 + 4,68 +2,58)
=
=
TINH NHANH
3,265+4,572+2,735+1,428
=
=
=
(10,38+12,58+14,68)-(0,38+4,68+2,58)
=
=
a) = 3,265 + 2,735 + 4,572 + 1,428
= 6,000 + 6,000
= 12,000
b) = 37,64 - 7, 64
= 30
Tính nhanh.
Câu 1: 3,265 + 4,572 + 2,735 + 1,428
Câu 2: (10,38 + 12,58 + 14,68) -(0,38 + 4,68 + 2,58)
Câu 3:17,6 - 5,3 + 16,8 - 7,6 + 15,3 - 6,8
Câu 4: 12,357 - 4,725 - 3,275
tớ cx đang thắc mắc câu 2!!!!!hihi!!^_^
tinh nhanh
a) 2,735 + 1,248 +3,265 + 4,752
b) ( 10,38 + 12,56 + 14,68 ) - ( 0,38 + 4,68 + 2,58 )
c) 17,6 - 5,3 + 16,8 - 7,6 + 15,3 - 6,8
a) Ta có: 2,735+1,248+3,265+4,752
=(2,735+3,265)+(1,248+4,752)
=6+6=12
b) Ta có: (10,38+12,56+14,68)-(0,38+4,68+2,58)
=(10,38-0,38)+(12,56-2,58)+(14,68-4,68)
=10+10+9,98
=29,98
a.2,735+1,248+3,265+4,752
b.(10,38+12,58+14,68)-(0,38+4,68+2,58)
c.17,6-5,3+ 16,8-7,6+15,3-6,8
d.12,357-3,275-4,725
e.17,3*7,42+2,58*17,3
g.(7,5*18,3+26,4*18,3)*(47*11-4700*0,1-47)
Tính nhanh :
a. (10,38 + 12,58 + 14,68) - (0,38 + 4,68 + 2,58)
giúp e ạ ><
(10,38 + 12,58 + 14,68) - (0,38 + 4,68 + 2,58)
= 37.64 - 7.64
= 30
Tính nhanh :
a. (10,38 + 12,58 + 14,68) - (0,38 + 4,68 + 2,58)
b. 17,6 - 5,3 + 16,8 - 7,6 + 15,3 - 6,8.
a) (10,38+12,58+14,68)-(0,38+4,68+2,58)
=10,38+12,58+14,68-0,38-4,68-2,58
=10+10+10
=30
b) 17,6-5,3+16,8-7,6+15,3-6,8
=10+10+10
=30
Tính nhanh:
a) 2,375+1,248+3,265+4,752
b) (10,38+12,58+14,68)-(0,348+4,68+2,88)
Tính nhanh:
a) 2,375 + 1,248 + 3,265 + 4,752
= ( 2,375 + 3,265 ) + ( 1,248 + 4, 752 )
= 5,64 + 6
= 11,64
b) ( 10,38 + 12,58 + 14,68 ) - ( 0,348 + 4,68 + 2,88 )
= ( 10,38 - 0,348 ) + ( 12,58 - 2,88 ) + ( 14,68 - 4,68 )
= 10,032 + 9,7 + 10
= 29,732
a) 2,375+1,248+3,265+4,752=(2,375+3,265)+(1,248+4,752)
=5,64+6
=11,64
b) (10,38+12,58+14,68)-(0,348+4,68+2,88)
(10,38+12,58+14,68) - (0,38+0,68+2,58) Cíu qv với ạaa
`(10,38+12,58+14,68) - (0,38+0,68+2,58)`
`= 10,38+12,58+14,68- 0,38-0,68 - 2,58`
`= (10,38- 0,38) +(12,58- 2,58)+(14,68- 0,68)`
`= 10 + 10 + 14`
`=20+14`
`=34`