精英家教网 > 小学数学 > 题目详情
16×6+36     14×15-120     500-42×5 18+12×6    
72÷2-16     84÷7+66 148-48÷6     48+112÷7    
6×8+7×9 8×7-2×9     24÷2+24×2     93÷3-645÷4
66÷3+72÷4     12×8-108÷6
分析:(1)(4)(9)先算乘法,再算加法;
(2)(3)(10)先算乘法,再算减法;
(5)(7)先算除法,再算减法;
(6)(8)(13)先算除法,再算加法;
(11)先算乘除,再算加法;
(14)先算乘除,再算减法.
解答:解:(1)16×6+36
=96+36
=132;

(2)14×15-120    
=210-120
=90;

(3)500-42×5
=500-210
=290;

(4)18+12×6
=18+72
=90;

(5)72÷2-16
=36-16
=20;

(6)84÷7+66
=12+66
=78;

(7)148-48÷6
=148-8
=140;

(8)48+112÷7
=48+16
=64;

(9)6×8+7×9
=48+63
=111;

(10)8×7-2×9
=56-18
=38;

(11)24÷2+24×2
=12+48
=60;

(12)93÷3-645÷4
=31-161.25
=-130.25;

(13)66÷3+72÷4
=22+18
=40;

(14)12×8-108÷6
=96-18
=78.
点评:混合运算抓住运算顺序,正确按运算顺序计算即可.
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