2.17.12+2.6.12+8.3.62=
2.17.12+4.6.21+8.3.62 = ?
2.17.12+4.6.21+8.3.62
=24.17+24.21+24.62
=24.(17+21+62)
=24.100
=2400
2.17.12 + 4.6.21 + 8.3.62
2.17.12=408
4.6.21=504
8.3.62=1488
2.17.12+4.6.21+8.3.62=408+504+1488=2400
K nhé MN????????
HOk tốt!!!!!!
2.17.12+4.6.21+8.3.62
=408+504+1488
=2400
tính nhanh 2.17.12+4.6.21+8.3.62=?
Tính nhanh 2.17.12+4.6.21+8.3.62= ?
1.Tính nhanh
a: 2.17.12+4.6.21+8.3.62
b: 37.24+37.76+63.79+63.21
\(2.17.12+4.6.21+8.3.62\)
\(=24.17+24.21+24.62\)
\(=24\left(17+21+62\right)\)
\(=24.100\)
\(=2400\)
\(37.24+37.76+63.79+63.21\)
\(=37\left(27+76\right)+63\left(79+21\right)\)
\(=37.100+63.100\)
\(=3700+6300\)
\(=10000\)
1.Tính nhanh
a: 2.17.12+4.6.21+8.3.62
=
b: 37.24+37.76+63.79+63.21
= 37.(24+76)+63. (79+21)
= 37.100+63.100
= 3700+6300
= 10000
ai nhanh và đúng thì mình tick
tính nhanh
2.17.12+4.6.21+8.3.62
2.17.12+4.6.21+8.3.62
=(2.12).17+(4.6).21+(8.3).62
=24.17+24.21+24.62
=24.(17+21+62)
=24.100
=2400
2.17.12+4.6.21+8.3.62
=(2.12).17+(4.6).21+(8.3).62
=24.17+24.21+24.62
=24.(17+21+62)
=24.100
=2400
2.17.12+4.6.21+8.3.62
=(2.12).17+(4.6).21+(8.3).62
=24.17+24.21+24.62
=24.(17+21+62)
=24.100
=2400
2.17.12+ 2.6.21+8.3.62=
thực hiện phép tính( hợp lý nếu có thể)
2.17.12+2.6.21+8.3.62
= ( 2.12 ). 17+ ( 4.6).21+ (8.3).62
= 24.17+ 24.21+ 24.62
= 24. ( 17+ 21+62 )
= 24. 100
= 2400
= ( 2.12 ). 17+ ( 4.6).21+ (8.3).62
= 24.17+ 24.21+ 24.62
= 24. ( 17+ 21+62 )
= 24. 100
= 2400
tính:
a) 2.17.12+4.6.21+8.3.62
b) 37.24+37.76+63.79+63.21
c) 25.(x-75)=25
d) (5.x-36):18=13
e) 5.x-36:18=13
câu b là:
=37.(24+76)+63.(79+21)
=37.100+63.100
=100.(37+63)
=100.100
=10000
a. 1+2+3+4+...+49+50
b. 2.17.12.+4.6.21+8.3.62
c. 37.24+37.76+63.79 +63.21
d. 2020.43+56.2020+2020
mong mọi người có thể làm giúp mik nha
1 + 2 + 3 + 4 + ..... + 49 + 50(có 50 số hạng)
=51 × 25 = 1275
2 . 17 . 12 + 4 . 6 . 21 + 8 . 3 . 62
= 24 . 17 + 24 . 21 + 24 . 62
= 24 . ( 17 + 21 + 62 )
= 24 . 100 = 2400
37 . 24 + 37 . 76 + 63 . 79 + 63 . 21
= 37 . (24 + 76) + 63 . (79 + 21)
= 37 . 100 + 63 . 100
= (37 + 63 ) . 100
= 100 . 100 = 10000
2020 . 43 + 2020 . 56 + 2020
= 2020 . 43 + 2020 . 56 + 2020 . 1
= 2020 . ( 43 + 56 + 1 )
= 2020 . 100 = 202000