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用递等式计算.521-21×12+881156÷17+5040÷42610-714÷21×15338+2108÷34-292(82-936÷78)×151305-(760+240÷40)(4076-114×15)÷91(628+830)÷(307-289)
题目详情
用递等式计算.
521-21×12+88 | 1156÷17+5040÷42 | 610-714÷21×15 |
338+2108÷34-292 | (82-936÷78)×15 | 1305-(760+240÷40) |
(4076-114×15)÷91 | (628+830)÷(307-289) |
▼优质解答
答案和解析
(1)521-21×12+88
=521-252+88
=269+88
=357;
(2)1156÷17+5040÷42
=68+120
=188;
(3)610-714÷21×15
=610-34×15
=610-510
=100;
(4)338+2108÷34-292
=338+62-292
=400-292
=108;
(5)(82-936÷78)×15
=(82-12)×15
=70×15
=1050;
(6)1305-(760+240÷40)
=1305-(760+6)
=1305-766
=539;
(7)(4076-114×15)÷91
=(4076-1710)÷91
=2366÷91
=26;
(8)(628+830)÷(307-289)
=1458÷18
=81.
=521-252+88
=269+88
=357;
(2)1156÷17+5040÷42
=68+120
=188;
(3)610-714÷21×15
=610-34×15
=610-510
=100;
(4)338+2108÷34-292
=338+62-292
=400-292
=108;
(5)(82-936÷78)×15
=(82-12)×15
=70×15
=1050;
(6)1305-(760+240÷40)
=1305-(760+6)
=1305-766
=539;
(7)(4076-114×15)÷91
=(4076-1710)÷91
=2366÷91
=26;
(8)(628+830)÷(307-289)
=1458÷18
=81.
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