计算下面各题.
13.4×5.6×2.5
6.75×0.12+15.73
3.25×7.4-8.5
1 8.7×3.3-15.2×2.6
45.2-14.36+17.6
9.43×61+24.77.
解:(1)13.4×5.6×2.5,
=75.04×2.5,
=187.6;
(2)6.75×0.12+15.73,
=0.81+15.73,
=16.54;
(3)3.25×7.4-8.5,
=24.05-8.5,
=15.55;
(4)18.7×3.3-15.2×2.6,
=61.71-39.52,
=22.19;
(5)45.2-14.36+17.6,
=30.84+17.6,
=48.44;
(6)9.43×61+24.77,
=575.23+24.77,
=600.
分析:(1)按照从左向右的顺序进行计算;
(2)先算乘法,再算减法;
(3)先算乘法,再算加法;
(4)先算乘法,再算减法;
(5)按照从左向右的顺序进行计算;
(6)先算乘法,再算加法.
点评:此题主要考查小数的四则混合运算的运算顺序,然后根据运算顺序进行计算.