Question

11.3乘12.2-26.3乘12.2-76乘负12.2 用简便计算

Answer 1

11.3×12.2-26.3×12.2-76×(-12.2)

=11.3×12.2-26.3×12.2+76×12.2

=12.2×(11.3-26.3+76)

=12.2×(76-15)

=12.2×61

=2×6.1×61

=0.2×61×61

=0.2×3721=744.2