17Ã40ï¼680, 100ï¼63ï¼37, 3.2ï¼1.68ï¼4.88, 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
10.6.25+3.85-2.125+3.875
11.9-2456*21
12.0.5/11.5-4*2.75
13.1/2Ã3/5
14.3.375+5.75+2.25+6.625
15.1001ï¼9036÷18
16.3.8Ã5.25+14.5
17.2.1*4.3+5.7*2.1
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