分析:算式(1)(3)根據(jù)四則混合運(yùn)算的運(yùn)算順序計(jì)算即可:先算乘除,再算加減,有括號(hào)的要先算括號(hào)里面的.
算式(2)可根據(jù)一個(gè)數(shù)減兩個(gè)數(shù),等于用這個(gè)數(shù)減去這兩個(gè)數(shù)的和的減法性質(zhì)進(jìn)行計(jì)算;
算式(4)可先根據(jù)乘法算式的性質(zhì)將60.5×6.5變?yōu)?.05×65后,再據(jù)乘法分配律計(jì)算.
解答:解:(1)0.16+4
÷(-),
=0.16+4÷
,
=0.16+4×4,
=0.16+16,
=16.16;
(2)70.8-9.28-0.72,
=70.8-(9.28+0.72),
=70.8-10,
=60.8;
(3)
×[
÷(
-)],
=
×[
÷
]
=
×8,
=
;
(4)60.5×6.5+6.05×35,
=6.05×65+6.05×35,
=(65+35)×6.05,
=100×6.05,
=605.
點(diǎn)評(píng):完成此類題目要認(rèn)真分析式中數(shù)據(jù)的特點(diǎn)及內(nèi)在聯(lián)系,然后運(yùn)用合適的方法進(jìn)行計(jì)算.