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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
=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
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