234\(\times\)25+75\(\times\)234
Tính hợp lí
125:25+12.4
25-(62-75)+38
334-(117+234)+(42+117)
\(125:25+12.4=5+48=53\)
\(25-\left(62-75\right)+38=25+13+38=76\)
Tính hợp lí
125:25+12.4
25-(62-75)+38
334-(117+234)+(42+117)
234 * 24 +75 *234 +*234
=234 x 24+75x234x234x1
=234x(75+24+1)
=234x100
=23400
đề sai thì phải
Thực hiện phép tính:
a) 6 5 12 : 2 3 4 + 11 1 4 1 3 − 1 5
b) 1 13 15 ⋅ 0 , 75 − 11 20 + 25 % : 7 5
a)
6 5 12 : 2 3 4 + 11 1 4 1 3 − 1 5 = 77 12 : 11 4 + 45 4 . 2 15 = 7 3 + 3 2 = 23 6
b)
1 13 15 ⋅ 0 , 75 − 11 20 + 25 % : 7 5 = 28 15 ⋅ 3 4 − 11 20 + 1 4 : 7 5 = 7 5 − 4 5 ⋅ 5 7 = 7 5 − 4 7 = 29 35
Tính nhanh
a, A = 125 × (-24) + 24 × 225
b, B = 26 (-125) -125 × (-36)
c, C = 25 × (75 - 45) -75 × ( 45 - 25 )
a) \(A=125\left(-24\right)+24.225\)
\(=24\left[\left(-125\right)+225\right]\)
\(=24.100=2400\)
b) \(B=26\left(-125\right)-125\left(-36\right)\)
\(=125\left[\left(-26\right)-\left(-36\right)\right]\)
\(=125.10=1250\)
c) \(C=25\left(75-45\right)-75\left(45-25\right)\)
\(=25.75-25.45-75.45-75.25\)
\(=\left(25.75-75.25\right)-25.45-75.45\)
\(=-25.45-75.45\)
\(=45\left(-25-75\right)\)
\(=45\left(-100\right)=-4500\)
Tính bằng 2 cách 234 x25 + 234 x 75
C1:
234x25+234x75
=234x(25+75)
=234x100
=23400
C2:
234x25+234x75
=5850+17550
=23400
C1:234 X 25 + 234 X 75 = 5850 + 17550 C2 : 234 x 25 + 234 x 75 = 234 X ( 25 + 75 )
= 23400 = 234 x 100
= 23400
C1: 234 x 25 + 234 x 75 C2: 234 x 25 + 234 x 75
= 5850 + 17550 = 234 x (25 + 75)
= 23400 = 23400.
* Nhớ k cho mk nha*
tìm cách tính thuận tiện nhất :
725 : 25 + 525 : 25
234 x 45 + 55 + 234 + 234
50 x 8 x 125 x 20
a: =1250:25=50
b: =234(45+55)+234=23400+234=23634
c: =1000x1000=1000000
Câu 1,234×24+75×234+234
Câu 2,135×111-1350-13500
234 x 24 + 75 x 234 + 234 = 234 x (24 + 75 + 1) = 234 x 100 = 23400
135 x 111 - 1350 - 13500 = 135 x 111 - 135 x 10 - 135 x 100 = 135 x (111 - 10 - 100) = 135 x 1 = 135
75 × 101 - 75 + 25 × 99 + 2
m.n tinh gium mik na!
75 . 101 - 75 + 25 . 99 + 2
= 75 ( 101 - 1 ) + 25 . 99 + 2
= 75 . 100 + 25 . 99 + 2
= 75 . 4 . 25 + 25 . 99 + 2
= 300 . 25 + 25 . 99 + 2
= 25 ( 300 + 99 ) + 2
= 25 . 399 + 2
= 9977
75.101-75+25.99+2=
=75.(101-1)+2475+2
=7500+2477
=9977
tick cho mịnh nha