早教吧 育儿知识 作业答案 考试题库 百科 知识分享

用递等式计算下面各题.9405-2940÷28×21920-1680÷40÷7690+47×52-39851+(2304-2042)×234215+(4361-716)÷81(247+18)×27÷2536-720÷(360÷18)1080÷(63-54)×80

题目详情
用递等式计算下面各题.
9405-2940÷28×21          920-1680÷40÷7           690+47×52-398
51+(2304-2042)×23       4215+(4361-716)÷81    (247+18)×27÷25
36-720÷(360÷18)1080÷(63-54)×80       (528+912)×5-6178
814-(278+322)÷15        1406+735×9÷45          3168-7828÷38+504
796-5040÷(630÷7)285+(3000-372)÷36      546×(210-195)÷30
▼优质解答
答案和解析
(1)9405-2940÷28×21 
=9405-105×21
=9405-2205
=7200

(2)920-1680÷40÷7 
=920-42÷7 
=920-6
=914

(3)690+47×52-398
=690+2444-398
=3134-398
=2736

(4)51+(2304-2042)×23
=51+262×23
=51+6026
=6077

(5)4215+(4361-716)÷81 
=4215+3645÷81 
=4215+45
=4260

(6)(247+18)×27÷25
=265×27÷25
=7155÷25
=286.2

(7)36-720÷(360÷18)
=36-720÷20
=36-36
=0

(8)1080÷(63-54)×80
=1080÷9×80
=120×80
=9600

(9)(528+912)×5-6178
=1440×5-6178
=7200-6178
=1022

(10)814-(278+322)÷15  
=814-600÷15  
=814-40
=774

(11)1406+735×9÷45 
=1406+6615÷45
=1406+147
=1553

(12)3168-7828÷38+504
=3168-206+504
=2962+504
=3466

(13)796-5040÷(630÷7)
=796-5040÷90
=796-56
=740

(14)285+(3000-372)÷36
=285+2628÷36
=285+73
=358

(15)546×(210-195)÷30
=546×15÷30
=8190÷30
=273