Tính hợp lí:
a) 13.57 + 43.13
b) 39.28 + 39.72
c)345.67 - 245.67
d) 123.34 + 123.26 + 123.40
e) 974.34 + 974.96 - 974.30
f) 37.148 - 37.53 + 37.5
g) 47.173 + 47 + 66.47
h) 24.57 + 43.24
i) 387.2694 + 7305.387 + 387
Tinh hop li:
47.173 + 47- 47.74
47.33 + 47 + 66.47
24.57 + 43.24
387.2694 + 7305.387 + 387
12.19 + 12
195.56 + 43.105 + 195
47.173 + 47 - 47.74
= 47.( 173 + 1 - 74 )
= 47. 100
= 4700
47.33 + 47 + 66.47
24.57 + 43.24
387.2694 + 7305.387 + 387
12.19 + 12
195.56 + 43.105 + 195
Tinh bang cach hop li:
a, 47.33 + 47 + 66.47
b, 24.57 + 43.24
c, 387.2694 + 7305.387 + 387
d, 563.78 - 26.563 + 563.48
ai nhanh dc tik :P
a) \(47.33+47+66.47=47.\left(33+1+66\right)=47.100=4700\)
b) \(24.57+43.24=24.\left(57+43\right)=24.100=2400\)
c) \(387.2694+7305.387+387=387.\left(2694+7305+1\right)=387.10000=3870000\)
d) \(563.78-26.563+563.48=563.\left(78-26+48\right)=563.100=56300\)
a. 47.33 + 47 + 66.47
= 47.(33 + 1 + 66)
= 47 . 100
= 4700
b. 24.57 + 43.24
= 24. (57 + 43)
= 24 . 100
= 2400
c. 387 . 2694 + 7305.387 + 387
= 387. (2694 + 7305 + 1)
= 387 . 10000
= 3870000
d. 563 . 78 - 26.563 + 563.48
= 563. (78 - 26 + 48)
= 563 . 100
= 56300
a) 47.33 + 47 + 66.47 = 47 .(33 + 1 + 66)
= 47 . 100 = 4700
b) 24 . 57 + 43 . 24 = 24.( 57 + 43)
= 24 . 100 = 2400
c) 387 . 2694 + 7305 .387 . 387
= 387 . (2694 + 7305 + 1)
= 387 . 10000 = 3870000
d) 563 . 78 - 26.563 + 563.48
= 563.(78 - 26 + 48)
= 563 . 100 = 56300
tính tổng
a)387.2694+7305.387+387
387.2694+7305.387+387
=387.2694+7305.387+38.1
=387.(2694+7305+1)
=387.10000
=3870000
a)387.2694+7305.387+387
= 387.2694+7305.387+387.1
=387.(2694+7305+1)
=387.10000
=3870000
387.2694+7305.387+387
nhanh lên like dang đợi
387.2694+7305.387+387
=387.2694+7305.387+387.1
=387.(2694+7305+1)
=387.10000
=3870000
tính giá trị biểu thức:
a.120-[7.20-(134-110).5]
b.1987-200.8+1005:5
c.387.2694+7305.387+387
d.248:{[(368+232):120-3]+122}+2016
a.120-[7.20-(134-110).5]
=120-(7.20-24.5)
=120-(140-120)
=120-20
=100
b.1987-200.8+1005:5
=1987-1600+201
=588
C, 387.2694+7305.387+387
=387.(2694+7305+1)
=387.10000
3870 000
d,
d.248:{[(368+232):120-3]+122}+2016
=248:{(600:120-3)+122}+2016
=248:(2+122)+2016
=248:144+2016
=2+2016
=2018
tính giá trị biểu thức
a.120-[7.20-(134-110).5]
b.1987-200.8+1005:5
c.387.2694+7305.387+387
d.248:{[(368+232):120-3]+122}+2016
cac ban giup mih voi.ai lam het tat ca mih se tick 3tick[hua do]
thoi han la den chieu thu 31/8/2016
a)120-[7.20-(134-110).5]
=120-20
=100
b)1987-200.8+1005:5
=1987-1600+201
=588
c)387.2694+7305.387+387
=1042578+2827035+387
=3870000
d)248:{[368+232):120-3]+122}+2016
=248:124+2016
=2+2016
=2018
a)120-[7.20-(134-110).5]
=120-20
=100
b)1987-200.8+1005:5
=1987-1600+201
=588
c)387.2694+7305.387+387
=1042578+2827035+387
=3870000
d)248:{[368+232):120-3]+122}+2016
=248:124+2016
=2+2016
=2018
Tính bằng cách hợp lí:
a, 387+(-224)+(-87)
b, (-75)+329+(-25)
c, 11+(-13)+15+(-17)
d, (-21)+24+(-27)+31
e, 251 +(-144)+(-151)+(-216)
f, (-137)+77+(-253)+37-47
a: =300-224=76
b: =-100+329=229
Làm tính nhân: - 1 3 . 5 7
Tính một cách hợp lí:
a) 2763 + 152