Question

Tính bằng cách thuận tiện nhất a)3,7 x 3,8 + 6,2 x 3,7= b)56,8 x 76,9 – 56,8 x 76,8=

Answer 1

\(3,7\times3,8+6,2\times3,7\\ =3,7\times\left(3,8+6,2\right)\\ =3,7\times10\\ =37\\ 56,8\times76,9-56,8\times76,8\\ =56,8\times\left(76,9-76,8\right)\\ =56,8\times0,1\\ =5,68\)

Answer 2

a)\(3,7\times3,8+6,2\times3,7\)
\(=3,7\times\left(3,8+6,2\right)\)
\(=3,7\times10=37\)
b)\(56,8\times76,9-56,8\times76,8\)
\(=56,8\times\left(76,9-76,8\right)\)
\(=56,8\times0,1=5,68\)

Answer 3

a,=3,7 x (3,8+6,2)=37

b,=56,8x(76,9-76,8)=5,68