tính nhanh
a) 2.31.12+4.6.42+8.27.3
b)36.28+36.82+64.69+64.41
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
a)2.31.12+4.6.42+8.27.3
b)36.28+36.82+64.69+64.41
a) kết quả là:2400
b)Kết quả là: 11000
Đáp số: 11000
a) 2 x 31 x 12 + 4 x 6 x 42 + 8 x 27 x 3
= 24 x 31 + 24 x 42 + 24 x 27
= 744 + 1008 + 648
= 2400
b) 36 x 28 + 36 x 82 + 64 x 69 + 64 x 41
= 36 x (28 + 82) + 64 x (69 + 41)
= 36 x 110 + 64 x 110
= (36 + 64) x 110
= 100 x 110
= 11000
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
a) 2.31.12+4.6.42+8.27.3
b)36.28+36.82+64.69+64.41
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
tinh 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.(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
trieu dang trả lời đúng rùi cho bạn ấy 1 cái đúng nhé
- a. 2.31.12+4.6.42+8.27.3
= 2.12.31 + 2.2.6.42 + 2.4.3.27
= (2.12).31 + (2.2.6).42 + (2.4.3).27
= 24.31 + 24.42 + 24.27
= 24. (31 + 42 + 27 )
= [ Kết quả cậu tự tính nhé ]
- b. 36.28+36.82+64.69+64.41
= [36.(28+82)] + [64.(69+41)]
= 36.100 + 64.110
= 3600 + 6440
= [ kết quả cậu tự tính ]
=> [ k for me ] :)) Mơn :3
Tinh nhanh:
a) 2.31.12+4.6.42+8.27.3
b) 36.28+36.82+64.69+64.41
2.31.12+4.6.42+8.27.3
=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)
=36.100+64.100
=(36+64).100
=100.100
=10000
a) 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
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