thực hiện phép tính, tính nhanh, hợp lý
a/ 36.28+36.82+64.69+64.41
b/ 2. 31. 12+4. 6.42+8.27.3
36.28+36.82+64.69+64.4.1
2.31.12+4+6.42+8.27.3
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
tính nhanh
a) 2.31.12+4.6.42+8.27.3
b)36.28+36.82+64.69+64.41
a)\(2.31.12+4.6.42+8.27.3\)
\(=24.31+24.42+24.27\)
\(=24.\left(31+42+27\right)\)
\(=24.100\)
\(=2400\)
b)\(36.28+38.82+64.69+64.41\)
\(=36.\left(28+82\right)+64.\left(69+41\right)\)
\(=36.110+64.110\)
\(=110.\left(36+64\right)\)
\(=110.100\)
\(=11000\)
a)2.31.12+4.6.42+8.27.3
=24.31+24.42+24.27
=24.(31+42+27)
=24.100
\(=2400\)
Ai trên 10 điểm hỏi đáp thì mình nha mình đang cần gấp chỉ còn 99 điểm là tròn rồi mong các bạn hỗ trợ mình sẽ đền bù xứng đáng
tích nha
tính nhanh:
a) 34 . 15 + 34 . 85
b) 12 . 57 + 57 . 25 + 63 . 57
c) 36 . 28 + 36 . 82 + 64 . 69 + 64 . 41
d) 2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3
Tính nhanh:
a) 34.15 + 34.85
b) 12.57 + 57.25 + 63.57
c) 36.28 + 36.82 + 64.69 + 64.41
d) 2.31.12 + 4.6.42 + 8.27.3
a) 34.15 + 34.85 = 34.(15+85) = 34.100 = 3400
b) 12.57 + 57.25 + 63.57 = 57.(12+25+63) = 57.100 = 5700
c) 36.28 + 36.82 + 64.69 + 64.41 = 36.(28+82) + 64(69+41) = 36.110 + 64.110 = 110.(36+64) = 11000
d) 2.31.12 + 4.6.42 + 8.27.3 = 24.31 + 24.42 + 24.27 = 24.(31+42+27) = 24.100 = 2400
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,24.31+24.42+24.27
=24.(31+42+27)
=24.100
=2400
b.36.(28+82)+64.(69+41)
=36.110+110.64
=110.(36+64)
=110.100
=11000
tính nhanh
2.31.12.+4.6.42+8.27.3
36.28+36.82+64.69+64.41
2.31.12 + 4.6.42 + 8.27.3
= 2.12.31 + 4.6.42 + 8.3.27
= 27.31 + 24.42 + 24.27
= 24.(31 + 42 + 27)
= 24.100
= 2400
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
2 . 31 . 12 .+ 4 . 6 . 42 + 8 . 27 . 3
= 2 . 12 . 31 + 4 . 6 . 42 + 8 . 3 . 27
= 24 . 31 + 24 . 42 + 24 . 27
= 24 . (31 + 42 + 27 )
= 24 . 100
= 2400
36 . 28 + 36 . 82 + 64 . 69 + 64 . 41
= 36 . (28 +82) + 64 . (69 + 41 )
= 36 . 110 + 64 . 110
= 110. ( 64 + 36 )
=110 . 100
= 11000
=
2.31.12+4.6.42+8.27.3=2.12.31+4.6.42+8.3.27
=24.31+24.42+24.27
=24.(31+42+27)
=24.100
=2400
36.28+36.82+64.69+64.41=36.(28+82)+64.(69+41)
=36.110+64.110
=110.(36+64)
=110.100
=11000