计算下面各题(能简算的要简算) (1)35×(26÷2+7) (2)400÷[480÷(16+8)] (3)78×26+26×22
计算下面各题(能简算的要简算)(1)35×(26÷2+7)(2)400÷[480÷(16+8)](3)78×26+26×22(4)57×101-57(5)125×(8+4...
计算下面各题(能简算的要简算) (1)35×(26÷2+7) (2)400÷[480÷(16+8)] (3)78×26+26×22 (4)57×101-57 (5)125×(8+4) (6)(86+19)×(95-69)
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(1)35×(26÷2+7),
=35×(13+7),
=35×20,
=700;
(2)400÷[480÷(16+8)],
=400÷[480÷24],
=400÷20,
=20;
(3)78×26+26×22,
=(78+22)×26,
=100×26,
=2600;
(4)57×101-57,
=57×(101-1),
=57×100,
=5700;
(5)125×(8+4),
=125×8+125×4,
=1000+500,
=1500;
(6)(86+19)×(95-69),
=105×26,
=(100+5)×26,
=100×26+5×26,
=2600+130,
=2730.
=35×(13+7),
=35×20,
=700;
(2)400÷[480÷(16+8)],
=400÷[480÷24],
=400÷20,
=20;
(3)78×26+26×22,
=(78+22)×26,
=100×26,
=2600;
(4)57×101-57,
=57×(101-1),
=57×100,
=5700;
(5)125×(8+4),
=125×8+125×4,
=1000+500,
=1500;
(6)(86+19)×(95-69),
=105×26,
=(100+5)×26,
=100×26+5×26,
=2600+130,
=2730.
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