Question

Tính nhanh:66.25+5.66+66.14+33.16

Answer 1

66.25+5.66+66.14+33.16

=66.25+5.66+66.14+33.2.8

=66.25+5.66+66.14+66.8

=66.(25+5+14+8)

=66.52=3432

Answer 2

= 66.25+5.66+66.14+33.2.8

= 66.25+5.66+66.14+66.8

= 66.(25+5+14+8)

= 66.52

= 3432

Answer 3

Chưa nhanh lắm!

Answer 4

\(66\cdot25+5\cdot66+66\cdot14+33\cdot16\)

\(=66\cdot25+5\cdot66+66\cdot14+33\cdot2\cdot8\)

\(=66\cdot25+5\cdot66+66\cdot14+66\cdot8\)

\(=66\cdot\left(25+5+14+8\right)\)

\(=66\cdot52\)

\(=3432\)