解题思路:(1)根据乘法分配律进行简算;
(2)先算小括号里面加法,再算除法,最后算括号外面的加法;
(3)根据乘法分配律进行简算;
(4)根据乘法分配律进行简算.
(1)5.65×35%﹢7.48×[7/20]-3.13×0.35
=5.65×0.35﹢7.48×0.35-3.13×0.35
=(5.65+7.48-3.13)×0.35
=10×0.35
=3.5;
(2)([4/5]+[1/4])÷[7/3]+[7/10]
=[21/20]÷[7/3]+[7/10]
=[9/20]+[7/10]
=[23/20];
(3)83×[5/7]+2÷[7/5]-[5/7]
=83×[5/7]+2×[5/7]-[5/7]
=(83+2-1)×[5/7]
=84×[5/7]
=60;
(4)72×([11/12]+[7/18]+[5/24])
=72×[11/12]+72×[7/18]+72×[5/24]
=66+28+15
=94+15
=109.
点评:
本题考点: 整数、分数、小数、百分数四则混合运算;运算定律与简便运算.
考点点评: 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.