2.8Ã0.4ï¼ 1.12
14ï¼7.4ï¼6.6,
1.92÷0.04ï¼48,
0.32Ã500ï¼160,
0.65ï¼4.35ï¼ 5
10ï¼5.4ï¼4.6,
4÷20ï¼0.2,
3.5Ã200ï¼700,
1.5ï¼0.06ï¼1.44
0.75÷15ï¼0.05,
0.4Ã0.8ï¼0.32,
4Ã0.25ï¼1,
0.36ï¼1.54ï¼2
1.01Ã99ï¼99.99,
420÷35ï¼12,
25Ã12ï¼300,
135÷0.5ï¼270
3/4 + 1/4 =1,
2 + 4/9 =22/9,
3 - 2/3 =7/3,
3/4 - 1/2= 1/4
1/6 + 1/2 -1/6 =1/2,
7.5-(2.5+3.8)=1.2,
7/8 + 3/8 =5/4
3/10 +1/5 =1/2,
4/5 - 7/10 =1/10,
2 - 1/6 -1/3 =1.5
0.51÷17ï¼0.03,
32.8ï¼19ï¼51.8,
5.2÷1.3ï¼4,
1.6Ã0.4ï¼ 0.64
4.9Ã0.7ï¼3.43,
1÷5ï¼0.2,
6÷12ï¼0.5,
0.87ï¼0.49ï¼0.38
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