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
16916493834 ÷ + × ( - )× ( -0.125)× 3914399423813
43411151 ÷ + ÷3 (1--)÷ 12÷(1+-) 727243683 33673715- ÷3+ 5- ÷[×(1-)] -(-)4457131112412
3237871177×+×0.6 ×+÷ ×101- 45425112532525
1
3、求比值
1402 0.4∶ 353
4、化简比
0.3吨∶150千克 0.6∶2
3、解方程: 815 X+512 X = 57
ⅹ÷5/8=1/3 3X÷35 = 512 ×815 7X=7/4 3X +135
35 = 75X—X=40
2
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