小学四年级黄冈小状元第一单元1
龙 文 环 球 教 育
教师1对1 中小学课外辅导 网址：
oareas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities龙文环球教育淘金分校 电话：020-23370520
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
43—13+ =87 ×7 ÷3=21
+38—7= 48÷ ×12=72
四则运算
第二课时 含有两级的运算①
基础作业
填一填。
（1）在没有括号的算式里，有乘除法和加减法，要先算（ ）。
（2）计算168—144 ÷12时，要先算（ ），再算（ ）法。
（3）计算32×6+24÷3时，可以同时先算（ ），再算（ ）法。
2、下面各组的运算顺序一样的打“√”，不一样的打“×”。
35—7+2
35÷7×2
2×8÷4
2+8÷4
72÷8×5
72—8+5
脱式计算。
龙 文 环 球 教 育
教师1对1 中小学课外辅导 网址：
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities龙文环球教育淘金分校 电话：020-23370520
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
4800÷75+72 400+612÷12 20×25—135÷9
960—24×25
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