分析:(1)先算除法,再算加法;
(2)先算小括號(hào)里的減法,再算乘法;
(3)從左向右進(jìn)行計(jì)算即可;
(4)先算除法,再算減法;
(5)先算乘法,再算加法;
(5B)先算乘法,再算加法;
(6)先算乘法,再算加法;
(6B)先算小括號(hào)里的減法,再算括號(hào)外的除法;
(7)先算小括號(hào)里的除法,再算括號(hào)外的乘法;
(7b)先算乘法,再算減法;
(8)先算乘法,再算減法;
(8b)先算小括號(hào)里的加法,再算括號(hào)外的乘法.
解答:(1)135+980÷7,
=135+140,
=275;
(2)(430-216)×7,
=214×7,
=1498;
(3)45×8÷4,
=360÷4,
=90;
(4)728-276÷3,
=728-92,
=636;
(5)35+15×11,
=35+165,
=200;
(5b)25×4+372,
=100+372,
=472;
(6)12×24+46,
=288+46,
=334;
(6b)305÷(213-208),
=305÷5,
=61;
(7)52×(36÷3),
=52×12,
=624;
(7b)98×4-276,
=392-276,
=116;
(8)42×11-368,
=462-368,
=94;
(8b)(60+70)×3,
=130×3,
=390.
點(diǎn)評(píng):考查了整數(shù)四則混合運(yùn)算的順序,注意有括號(hào)的運(yùn)算.