(1)234+(366+42)+158 (2)2870÷(17+65)+178 (2)416-327+184-273 (4)(398+74×17)÷24
(1)234+(366+42)+158(2)2870÷(17+65)+178(2)416-327+184-273(4)(398+74×17)÷24....
(1)234+(366+42)+158 (2)2870÷(17+65)+178 (2)416-327+184-273 (4)(398+74×17)÷24.
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(1)234+(366+42)+158,
=(234+366)+(42+158),腔迟
=600+200,
=800;
(2)2870÷(17+65)+178,
=2870÷82+178,
=35+178,
=213;
(3)416-327+184-273,
=(416+184)-(327+273)神咐,
=600-600,
=0;
(4)(398+74×17)÷24,
=(398+1258)÷24,
=1656÷24,
=69.伍瞎李
=(234+366)+(42+158),腔迟
=600+200,
=800;
(2)2870÷(17+65)+178,
=2870÷82+178,
=35+178,
=213;
(3)416-327+184-273,
=(416+184)-(327+273)神咐,
=600-600,
=0;
(4)(398+74×17)÷24,
=(398+1258)÷24,
=1656÷24,
=69.伍瞎李
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