tính bằng cách thuận tiện
36.28+36.82+64.69+64.41
Tính nhanh: 36.28 + 36.82 + 64.69 + 64.41
36.28 + 36.82 + 64.69 + 64.41
= (36.28 + 36. 82) + ( 64.69 + 64.41)
= 36.(28 + 82) + 64.(69 + 41)
= 36.110 + 64.110 = 110.( 36 + 64 ) = 110.100 = 11000
Bài 2. Tính bằng cách hợp lí nhất:
a) 38. 63 + 37. 38
b) 12.53 + 53. 172– 53. 84
c) 35.34 +35.38 + 65.75 + 65.45
d) 39.8 + 60.2 + 21.8
e) 36.28 + 36.82 + 64.69 + 64.41
Bài 2:
a)38.63+37.38=38(63+37)=3800
b)12.53+53.172– 53.84=53(12+172-84)=5300
c)35.34+35.38+65.75+65.45=35(34+38)+65(75+45)=2520+7800=10320
d)39.8 +60.2 +21.8=8(39+21)+120=480+120=600
e)36.28+36.82+64.69+64.41=36(28+82)+64(69+41)=3960+7040=11000
Bài 2. Tính bằng cách hợp lí nhất:
a) 38. 63 + 37. 38 b) 12.53 + 53. 172– 53. 84
c) 35.34 +35.38 + 65.75 + 65.45 d) 39.8 + 60.2 + 21.8
e) 36.28 + 36.82 + 64.69 + 64.41
a)38.63+37.38
=38.(63+37)
=38.100
=3800
a) \(=38\left(63+37\right)=38.100=3800\)
b) \(=53\left(12+172-84\right)=53.100=5300\)
c) \(=35\left(34+38\right)+65\left(75+45\right)=35.72+65.120=10422\)
d) \(=39.8+15.8+21.8=8\left(39+15+21\right)=8.75=600\)
e) \(=36\left(28+82\right)+64\left(69+41\right)=36.110+64.110=110\left(36+64\right)=110.100=11000\)
1. TÍNH NHANH:
36.28+36.82+64.69+64.41
36.28 + 36.82 + 64.69 + 64.41 = 36.(28 + 82) + 64.(69 + 41) = 36.110 + 64.110 = (36 + 64).110 = 100.110 = 11000
\(36x28+36x82+64x69+64x41\)
\(=36x\left(28+82\right)+64x\left(69+41\right)\)
\(=36x110+64x110\)
\(=\left(36+64\right)x110\)
\(=100x110\)
\(=11000\)
=36.(28+82)+64.(69+41)
=36.110+64.110
=(36+64).110
=100.110
=11000
k minh nha
36.28+36.82+64.69.+64.41
36.28+36.82+64.69+64.41
=36.(28+82)+64.(69+41)
=36.110+64.110
=(36+64).110
=100.110
=11000
36 . 28 + 36 . 82 + 64 . 69 + 64 . 41
= 36( 28 + 82 ) + 64( 69 + 41 )
= 36 . 110 + 64 . 110
= 110 ( 36 + 64 )
= 110 . 100
= 11000
36.28+36.82+64.69+64.41
Ta có:36.28+36.82+64.69+64.41
=36.(28+82)+64.(69+41)
=36.110+64.110
=110.(36+64)
=110.100
=11000
Nhớ bấm đúng cho mình nếu thấy đúng nha!
36.28+36.82+64.69+64.41
= 36 * ( 28 + 82 ) + 64 * ( 69 + 41 )
= ( 36 + 64 ) * 110
= 100 * 110
= 11 000
tính
a)136.41+82.32
b)36.28+36.82+64.69+64.41
a) 136.41+82.32 =136.41 +41.2.32 =136.41+41.64 =41.(136+64)=41.200 =8200
b) 36.28+36.82+64.69+64.41 = 36.(28+82)+ 64.(69+41)=36.110+64.110=110.(36+64) =110.100=11000
Tính nhanh:
a)2.31.12+4.6.42+8.27.3
b)36.28+36.82+64.69+64.41
a)=24.31+24.42+24.27=24.(31+42+27)=24.100=2400
b)=36.(28+82)+64.(69+41)=36.110+64.110=110.(36+64)=110.100=11000
a) 2.31.12 + 4.6.42 + 8.27.3 = 24.31 + 24.42 + 24.27 = 24.(31 + 42 + 27) = 24.100 = 2400
b) 36.28 + 36.82 + 64.69 + 64.41
= 36.(28 + 82) + 64.(69 + 41)
= 36. 110 + 64. 110
= 110. (36 + 64) = 110.100 = 11000
Tính nhanh
a:2.31.12+4.6.42+8.27.3
b:36.28+36.82+64.69+64.41
a ) = 24 . 31 + 24.42 + 24.27
= 24 . ( 31+42+27)
=24.100
= 2400
b) = 36.( 28+82) + 64.( 69+41)
= 36.101 + 64.101
=101.( 36+64)
=101.100
=10100
A) 2.31.12+4.6.42+8.27.3
=( 2.12 )+31.( 4.6 )+42. ( 8.3)+27
=24 . (31 + 42 +27 )
=24 . ( 73 + 27)
= 24 . 100
= 2400
B ) 36 . 28 + 36.82+64. 69+64 . 41
= 36 . ( 28 + 82 )+ 64 . ( 69 + 41 )
= 36 . 110+64.110
=110 . (36 + 64 )
= 110 . 100
= 11000