分数乘、除法对比练习题比赛题
1、 直接写出得数: 554272325
×12 = 6× = × = + = 2 × = 24249103456
86135139174
72÷ = - = ÷12= ÷ = ÷ = 9175162010087
511311111 6= × ×10= -( - )= ÷ ÷ =
45474305521
2、下面各题怎样简便怎样算:
415711391394 × × 12×( - ) × + × 72212124810171017
1111139988 - × 36× ÷ × 13133337261327
169193834 ÷ + × ( - )× ( -0.125)× 3914399423813
43411115 ÷ + ÷3 (1--)÷ 12÷(1+-) 7272483634-
3434÷3+ 5-
523472587253613113÷[
711×(1-
37)]
725725712-(
14-
512)
×+
5×0.6 ×11+÷ ×101-
3、求比值
14035 0.4∶
2323
4、化简比
0.3吨∶150千克 0.6∶
3、解方程: 85358135
X+ X = 57 X÷ = × 3X + = 151251215357
ⅹ÷5/8=1/3 7X=7/4 5X—X=40
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