Question

999.9×2.6+333.3×1.2简便计算

Answer 1

999.9×2.6+333.3×1.2

=333.3×3×2.6+333.3×1.2

=333.3×(7.8+1.2)

=333.3×9

=333.3×(10-1)

=3333-333.3

=2999.7