分析:(1)先把小括號里面的運(yùn)算運(yùn)用乘法分配律簡算,再算括號外的除法;
(2)運(yùn)用就加法結(jié)合律和減法的性質(zhì)簡算;
(3)先把3.2分解成4×0.8,再運(yùn)用乘法結(jié)合律簡算;
(4)先算小括號里面的加法,再算括號外的除法;
(5)先運(yùn)用乘法分配律簡算,再算減法;
(6)運(yùn)用乘法分配律簡算.
解答:解:(1)(2.5×6+2.5×4)÷5,
=2.5×(6+4)÷5,
=2.5×10÷5,
=25÷5,
=5;
(2)35.6-2.8+4.4-7.2,
=(35.6+4.4)-(2.8+7.2),
=40-10,
=30;
(3)0.25×3.2×12.5,
=0.25×4×0.8×12.5,
=(0.25×4)×(0.8×12.5),
=1×10,
=10;
(4)7.5÷(1.5+2.5),
=7.5÷4,
=1.875;
(5)0.6×(5+0.6)-1,
=0.6×5+0.6×0.6-1,
=3+0.36-1,
=3.36-1,
=2.36;
(6)3.7×1.25-3.7×0.25,
=3.7×(1.25-0.25),
=3.7×1,
=3.7.
點評:此題是考查四則混合運(yùn)算,要仔細(xì)觀察算式的特點,靈活運(yùn)用一些定律進(jìn)行簡便計算.