要计算四年级下册数学75×46+75×55-75，我们可以采用分步骤计算的方法。首先，计算75×46和75×55的结果，然后将这两个结果相加，最后将75减去得到的和即可。
具体做法如下：
1. 计算75×46，首先将75拆解成50+25，然后分别计算50×46和25×46的结果，并将它们相加。50×46 = 2300，25×46 = 1150，所以75×46 = 2300+1150 = 3450。
2. 计算75×55，同样将75拆解成50+25，然后分别计算50×55和25×55的结果，并将它们相加。50×55 = 2750，25×55 = 1375，所以75×55 = 2750+1375 = 4125。
3. 将步骤1和步骤2中得到的结果相加，即3450+4125 = 7575。
4. 最后，将步骤3中得到的结果7575减去75，得到最终计算结果7500。
因此，四年级下册数学75×46+75×55-75的计算结果为7500。
用筷子并不能试出男女：
1、找家里吃饭用的筷子，要完好无损的，新买的不行。
2、找四根筷子，然后在自己家里房间或别的地方进行，但必须安静。
3、两个人面对面坐着，然后一人拿两根，一手拿一个左手和右手相隔三十厘米左右，用夹菜的那头两人互相对着，四根筷子一定要对上，对着的时候手一定不要抖，尽量放松。
4、然后就可以问筷子问题了。问的时候心灵一定要诚恳，不能笑，两个人谁问都可以，比如说谁怀孕了，你就说谁的大名。只能问亲人，问筷子的时候就这样问：“筷子筷子请问xxx生的是男孩还是女孩”。如果是男孩子，四根筷子会向内对折，是女孩子就会向反方向弯。
5、确保准确度，可以问两遍哦。
用筷子测试胎儿的性别，听起来多少缺乏科学根据，不过孕期无聊可以试试看，增添孕期乐趣，何乐而不为呢。
During the Spring Festival, family members usually do a lot of preparations to welcome the new year. Here are some examples of what family members might do:
1.Clean the house: Before the Spring Festival, family members will clean the house thoroughly to remove dirt and cobwebs and make the house look整洁 and fresh.
2.Decorate the house: Family members will decorate the house with Spring Festival decorations such as red lanterns, couplets, and window paper to add a festive atmosphere to the house.
3.Prepare food: Family members will prepare a lot of food for the Spring Festival, including dumplings, niangao, and other traditional foods. They will also buy some fruits, nuts, and sweets to treat guests.
4.Buy gifts: Family members will buy gifts for each other and for relatives and friends. These gifts can be clothes, shoes, or other items.
5.Prepare red envelopes: During the Spring Festival, family members will prepare red envelopes to give to children and younger relatives. These red envelopes usually contain money as a gift.
In short, during the Spring Festival, family members will do a lot of preparations to welcome the new year and spend a happy and peaceful Spring Festival.