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
计算.(能用简便方法的用简便方法计算)186×101-186675×39+325×39415-176-24463-187+137-1136400÷25÷48.29+3.7...
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.
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(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. |
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