题目内容
| 计算.(能用简便方法的用简便方法计算) 186×101-186 | 675×39+325×39 | 415-176-24 |
| 463-187+137-113 | 6400÷25÷4 | 8.29+3.7+0.71+6.3. |
(1)186×101-186
=(101-1)×186,
=100×186,
=18600;
(2)675×39+325×39
=(675+325)×39,
=1000×39,
=39000;
(3)415-176-24
=415-(176+24),
=415-200,
=215;
(4)463-187+137-113
=(463+137)-(187+113),
=600-300,
=300;
(5)6400÷25÷4
=6400÷(25×4),
=6400÷100,
=64;
(6)8.29+3.7+0.71+6.3
=(8.29+0.71)+(3.7+6.3),
=9+10,
=19.
=(101-1)×186,
=100×186,
=18600;
(2)675×39+325×39
=(675+325)×39,
=1000×39,
=39000;
(3)415-176-24
=415-(176+24),
=415-200,
=215;
(4)463-187+137-113
=(463+137)-(187+113),
=600-300,
=300;
(5)6400÷25÷4
=6400÷(25×4),
=6400÷100,
=64;
(6)8.29+3.7+0.71+6.3
=(8.29+0.71)+(3.7+6.3),
=9+10,
=19.
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