345+636=981

546,6-15,98=530,62

234x3,06=716,04

1041,3:2,67=390

155,9:45=3,46(4)

356,7+9,87=366,57

134,9-78,65=56,25

=(3,45+2,67+3,880)x2012

=10x2012

=20120

a, 2,67 : 0,25 + 2,67 x 3 + 2,67 : 0,5 + 26,7 x 0,1

= 2,67 x 4 + 2,67 x 3 + 2,67 x 2 + 2,67 x 1

= 2,67 x (4 + 3  + 2 + 1)

= 2,67 x 10

= 26,7

Tui ko biết ?

a) x – 235,478 = 124,53 x 2   

x – 235,478 = 249.06

x = 249,06 + 235,478

x = 484.538

b) 1772,82 : x = 23,45 x 12,6

 1772,82 : x = 295.47

x =  1772,82 : 295,47

x= 6

\(\left(198,08\times23,56+165,9:27\right)\times\left(25,07\times3-75,21\right)+8,8\\ =\left(198,08\times23,56+165,9:27\right)\times\left(75,21-75,21\right)+8,8\\ =\left(198,08\times23,56+165,9:27\right)\times0+8,8\\ =0+8,8\\ =8,8\)

(198,08×23,56+ 165,9:27) × (25,07×3−75,21)+ 8,8

= (198,08 × 23,56 + 165,9 : 27) × (75,21 − 75,21) + 8,8

= (198,08× 23,56 +165,9:27) × 0 + 8,8

= 0+8,8

= 8,8

=(198,08*23,56+165,9:27)*0+8,8

=0+8,8

=8,8

123000 ban nhe

123000

A = 38,27 x 2,5 + 23,45 x 19 - 1,25 + 19 x 1,55

A = 95,675 + 445,55 - 1,25 + 29,45

A = 569,425

ai nhanh minh h

a, 2,67 \(\times\) \(x\) + 6,33 \(\times\) \(x\) + \(x\) = 50

    \(x\) \(\times\) (2,67 + 6,33 + 1) = 50

    \(x\times\) 10 = 50

     \(x\)        = 50 : 10

       \(x\)      = 5