38+41+117+159+62
tính hợp lí -38+41-117+159-62
Tính hợp lí :
a. 38 + 41 + 117 + 159 + 62
b. 42 . 53 + 47 . 156 - 47 . 114
a) 38 + 41 + 117 + 159 + 62
= ( 38 + 62 ) + ( 41 + 159 ) + 117
= 100 + 200 + 117
= 300 + 117
= 417
b) 42 . 53 + 47 . 156 - 47 .114
= 42 . 53 + 47 . ( 156 - 114 )
= 42 . 53 + 47 x 42
= 42 . ( 53 + 47 )
= 42 x 100
= 4 200
a,38 + 41 + 117 + 159 + 62
= 38 + 62 + 41 + 159 +117
= ( 38 + 62 ) + ( 41 + 159 ) + 117
= 100 + 200 + 117
= 300 + 117
= 417
b, 42 x 53 + 47 x 156 - 47 x 114
= 42 x 53 + 47 x ( 156 - 114 )
= 42 x 53 + 47 x 42
= 42 x ( 53 + 47 )
= 42 x 100
= 4200
tính bằng cách thuận tiện nhất:
a: 38+41+117+159+62
b:341*67+659*83+341*16
a.38 + 41 + 117 + 159 + 62 = (38 + 62) + (41 + 159) + 117 = 100 + 200 + 117 = 300 + 117 = 417
b.341 x 67 + 659 x 83 + 341 x 16 = 341 x (16 + 67) + 659 x 83 = 341 x 83 + 659 x 83 = (341 + 659) x 83 = 1000 x 83 = 83000
a) 38 + 41 + 117 + 159 + 62 = ( 38 + 62 ) + ( 41 + 159 ) + 117 = 100 + 200 + 117 = 417
b) 341 . 67 + 659 . 83 + 342 . 16 = ( 341 + 659 ) . ( 67 + 83 ) . 342 . 16 = 1000 . 150 . ( 342 + 16 ) = 53 700 000
nhớ ủng hộ cho mik với nha các bn
a) 38+41+117+159+62
b) 73+86+968+914+3032
c) 341x67+341x16+659x83
d) 42x53+47x156-47x114
tính bằng cách thuận tiện nhất
a)38+41+117+159+62
b)42.53+47.156-47.144
c)341.67+341.16+659.83
(.)là dấu nhân
a) 38 + 41 + 117 + 159 + 62
= ( 38 + 62 ) + ( 41 + 159 ) + 117
= 100 + 200 + 117
= 417
38+41+117+159+62
=(38+62)+((41+159)+117
=100+200+117
=417
b) 42 . 53 + 47 . 156 - 47 . 144 c) 341 .67 + 341 . 16 + 659 . 83
= 42 . 53 + 47 . ( 156 - 144 ) = 341 . ( 67 + 16 ) + 659 . 83
= 42 .53 + 47 . 12 = 341 . 83 + 659 . 83
= 2226 + 564 = 83 . ( 341 + 659 )
= 2790 = 83 . 1000
= 83 000
xong rùi k nha
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Thực hiện các phép tính sau bằng cách hợp lí nhất :
a) 38 + 41 + 117 + 159 + 62
b) 73 +86 +968 +914+ 3032.
c) 341.67 + 341.16 + 659.83
d) 42.53 + 47. 156-47. 114.
\(a,38+41+117+159+62\\ =\left(38+62\right)+\left(41+159\right)+117\\ =100+200+117\\ =300+117\\ =417.\\ b,73+86+914+3032\\ =73+1000+3032\\ =1073+3032\\ =5150.\\ c,314.67+314.16+659.83\\ =314.\left(67+16\right)+659.83\\ =314.83+659.83\\ =83.\left(314+659\right)\\ =83.937\\ =?\)
Bn xem lại phần \(c,\) .
\(d,42.53+47.156-47.114\\ =42.53+47.\left(156-114\right)\\ =42.53+47.42\\ =42.\left(53+47\right)\\ =42.100\\ =4200.\)
a) \(38+41+117+159+62=(38+62)+(41+159)+117 \)
\(=100+200+117 =300+117 =417\)
b) \(73+86+968+914+3032=(86+914)+(968+3032)+73\)
\(=1000+4000+73=5073\)
c) \(341.67+341.16+659.83 =341.(67+16)+659.83 =341.83+659.83\)
\(=83.(341+659) =83.1000=83000\)
d) \(42.53+47.156-47.114 =42.53+47(156-114) =42.53+47.42 =42.(53+47)=42.100=4200\)
Thực hiện các phép tính sau bằng cách hợp lý :
a,38+41+117+159+62
b,73+86+968+914+3032
c,341.67+341.16+659.83
d,42.53+47.156-47.114
a, ( 38 + 62 ) + ( 41 + 159 ) + 117
= 100 + 200 + 117
= 417
b, ( 968 + 3032 ) + ( 86 + 914 ) + 73
= 4000 + 1000 + 73
= 5073
c, 341 x ( 67+ 16 ) + 659 x 83
= 341 x 83 + 659 X 83
= 83 x ( 341 + 659 )
= 83 x 1000
= 83000
d, 42 x 53 + 47 x ( 156 - 114 )
= 42 x 53 + 47 x 42
= 42 x ( 53 + 47 )
= 42 x 100
4200
=5073
a) 38 + 41 + 117 + 159 + 62
= ( 38 + 62 ) + ( 41 + 159 ) + 117
= 100 + 200 + 117
= 417
b) 73 + 86 + 968 + 914 + 3032
= 73 + ( 86 + 914 ) + ( 968 + 3032 )
= 73 + 1000 + 4000
= 5073
c) 341 . 67 + 341 . 16 + 659 . 83
= 341 . ( 67 + 16 ) + 659 . 83
= 341 . 83 + 659 . 83
= 83 . ( 341 + 659 )
= 83 . 1000
= 83 000
d) 42 . 53 + 47 . 156 - 47 . 114
= 42 . 53 + 47 . ( 156 - 114 )
= 42 . 53 + 47 . 42
= 42 . ( 53 + 47 )
= 42 . 100
= 4200
Học tốt !!!
=))
thuc hien cac phep tinh sau bang cach hop li nhat
a] 38+41+117+159+62
b] 73+86+968+914+3032
c]341.67+34116+658+83
d]4253+47156-47114
bài 1 tính nhanh
a ) 24 - 62 + 48 . 19
b ) 38 + 41 + 117 + 159 + 62
c ) 42 . 53 + 47 + 156 - 47 . 114
d ) 73 + 86 + 986 + 914 + 3032
e ) 341 . 67 + 341 . 16 + 659 . 83
a) 24.62+48.19
=24.62+24.2.19
=24.(62+2.19)
=24.(62+38)
=24.100=2400
b) 38+41+117+159+62
=(38+62)+(41+159)+117
=100+200+117
=417
c)42.53+47.156-47.114
=42.53+(47.156-47.114)
=42.53+47.(156-114)
=42.53+47.42
=42.(53+47)
=42.100
=4200