: .
×11= 10÷ = × = 5× =
4 1
× ×
15 4 = ÷ = × = =
5 5
5－ = ×12= ＋5= 300×%=
×= ×= ×1000= ×= 12 144
× = ＋ = 4× = 12÷ = 430-250= += -= 7200÷800=
0÷10%= ×80%= －（ － ）＝ 40×20%=
－= ÷4= ÷13= ÷5=
25×4= ×8= ÷= ÷2=
××4= （＋）×= 40×20%=口算练习题五 （第五周） 口算练习题六 （第六周）
×11= 10÷ = × = 5× = × = ÷2= × = ÷ =
4 1
1 3 8÷ ＝ ÷ ＝ － = ＋ =
10÷10%= ×80%= 6× = 12÷ = 7 2
4 5
5 5
5－ = ×12= ＋5= 300×%=
12 144
÷1= 12÷ = 1÷ = × = 4 2 4
28÷ = 1÷ × = 1÷ ＝ × ＝
5 5 15
+= －= ×= 6×= 5 3 9 3 4
× = ÷ = × =
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