问题 解答题
怎样简便就怎样计算.
4.98+8.02×2.560.8-40.8÷2.50.8×69.6×12.5
4.98×99+4.96.48÷3.2÷2.51.2×7.6+7.6×6.8.
答案

(1)4.98+8.02×2.5,

=4.98+20.25,

=25.03;

(2)60.8-40.8÷2.5,

=60.8-16.32,

=44.48;

(3)0.8×69.6×12.5,

=(0.8×12.5)×69.6,

=10×69.6,

=696;

(4)4.98×99+4.9,

=493.02+4.9,

=497.92;

(5)6.48÷3.2÷2.5,

=6.48÷(3.2×2.5),

=6.48÷8,

=0.81;

(6)1.2×7.6+7.6×6.8,

=7.6×(1.2+6.8),

=7.6×8,

=60.8.

单项选择题 A3/A4型题
单项选择题