能简便计算的尽量用简便方法计算37×49+37×51 &nb...
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解决时间 2021-03-10 15:51
- 提问者网友:富士山上尢
- 2021-03-09 16:28
能简便计算的尽量用简便方法计算37×49+37×51 102×46 25×43×2×4 700÷25 165÷[3×(47-42)] 105×34-34×5.
最佳答案
- 五星知识达人网友:一秋
- 2021-03-09 17:25
(1)37×49+37×51
=37×(49+51)
=37×100
=3700;
(2)102×46
=(100+2)×46
=100×46+2×46
=4600+92
=4692;
(3)25×43×2×4
=25×4×2×43
=100×2×43
=200×43
=8600;
(4)700÷25
=(700×4)÷(25×4)
=2800÷100
=28;
(5)165÷[3×(47-42)]
=165÷[3×5]
=165÷15
=11;
(6)105×34-34×5
=(105-5)×34
=100×34
=3400.
=37×(49+51)
=37×100
=3700;
(2)102×46
=(100+2)×46
=100×46+2×46
=4600+92
=4692;
(3)25×43×2×4
=25×4×2×43
=100×2×43
=200×43
=8600;
(4)700÷25
=(700×4)÷(25×4)
=2800÷100
=28;
(5)165÷[3×(47-42)]
=165÷[3×5]
=165÷15
=11;
(6)105×34-34×5
=(105-5)×34
=100×34
=3400.
全部回答
- 1楼网友:胯下狙击手
- 2021-03-09 18:56
(1)37×49+37×51,
=37×(49+51),
=37×100,
=3700;
(2)108×25,
=27×4×25,
=27×(4×25),
=27×100,
=2700;
(3)25×125×2×4,
=(25×4)×(125×2),
=100×250,
=25000;
(4)56×99+56,
=56×(99+1),
=56×100,
=5600;
(5)124×75-124×72-124×2,
=124×(75-72-2),
=124×1,
=124;
(6)104×39-39×4,
=(104-4)×39,
=100×39,
=3900.
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