Register Now

Login

Lost Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email.

222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: Thực hiện phép tính A.4×5+8×10-50 B.9×8²+9×6² C.5³×37-5²×37+1300

Toán Lớp 6: Thực hiện phép tính
A.4×5+8×10-50
B.9×8²+9×6²
C.5³×37-5²×37+1300

Comments ( 2 )

  1. a) 4 × 5 + 8 × 10 – 50
    = 20 + 80 – 50
    = 100 – 50
    = 50
    b) 9 × 8^2 + 9 × 6^2
    = 9 × 64 + 9 × 36
    = 9 × ( 64 + 36 )
    = 9 × 100
    = 900
    C.5^3 × 37 – 5^2 × 37 + 1300
    = 125 × 37 – 25 × 37 + 1300
    = ( 125 – 25 ) × ( 37 – 37 ) + 1300
    = 100 × 0 + 1300
    = 0 +1300
    = 1300

  2. $\text{a)4 × 5 + 8 × 10 – 50}$
    $\text{= 20 + 80 – 50}$
    $\text{= 100 – 50}$
    $\text{= 50}$
    $\text{b)9 × 8² + 9 × 6²}$
    $\text{= 9 × 64 + 9 × 36}$
    $\text{= 9 × (64 + 36)}$
    $\text{= 9 × 100}$
    $\text{= 900}$
    $\text{c)5³ × 37 – 5² × 37 + 1300}$
    $\text{= 125 × 37 – 25 × 37}$
    $\text{= (125 – 25) × (37 – 37) + 1300}$
    $\text{= 100 × 0 + 1300}$
    $\text{= 0 + 1300}$
    $\text{= 1300}$
     

Leave a reply

222-9+11+12:2*14+14 = ? ( )

About Thúy Mai