ï¼1ï¼2.5*32*0.125
=ï¼2.5*4ï¼*ï¼8*0.125ï¼
=10*1
=10
ï¼2ï¼3.5-7+6.5
=3.5+6.5-7
=3
ï¼3ï¼1.2Ã2.5+0.8Ã2.5
=2.5(1.2+0.8)
=25
ï¼4ï¼8.9Ã1.25-0.9Ã1.25
=1.25(8.9-0.9)
=10
ï¼5ï¼12.5Ã7.4Ã0.8
=12.5Ã0.8Ã7.4
=74
ï¼6ï¼6.5Ã9.5+6.5Ã0.5
=6.5Ãï¼9.5+0.5ï¼
=6.5Ã10
=65
ï¼7ï¼0.35Ã1.6+0.35Ã3.4
=0.35*ï¼1.6+3.4ï¼
=0.35*5
=1.75
ï¼8ï¼6.72-3.28-1.72
=6.75-ï¼3.28+1.72ï¼
=6.75-5
=1.75
ï¼9ï¼0.45+6.37+4.55
=0.45+4.55+6.37
=5+6.37
=11.37
ï¼10ï¼28Ã12.5-12.5Ã20
=ï¼28-20ï¼*12.5
=8*12.5
=100
ï¼11ï¼23.65-ï¼3.07+3.65ï¼
=23.65-3.65-3.07
=20-3.07
=16.93
ï¼12ï¼ï¼4+0.4Ã0.25ï¼8Ã7Ã1.25
=ï¼4+1ï¼*7*10
=5*7*10
=350
ï¼13ï¼1.65Ã99+1.65
=1.65*ï¼99+1ï¼
=1.65*100
=165
ï¼14ï¼27.85-ï¼7.85+3.4ï¼
=27.85-7.85+3.4
=20+3.4
=23.4
ï¼15ï¼48Ã1.25+50Ã1.25Ã0.2Ã8
7.8Ã9.9+0.78
=7.8*ï¼9.9+0.1ï¼
=7.8*10
=78
ï¼16ï¼4.8Ã46+4.8Ã54
=ï¼46+54ï¼*4.8
=100*4.8
=480
ï¼17ï¼673-327-173
=673-ï¼327+173ï¼
=673-500
=173
ï¼18ï¼4.44*2.5
=1.11*ï¼4*2.5ï¼
=1.11*10
=11.1
ï¼19ï¼3.5÷1.4
=ï¼3.5÷0.7ï¼Ã·ï¼1.4÷0.7ï¼
=5÷2
=2.5
ï¼20ï¼1+2+3+4+5......+99+100
=ï¼1+99ï¼+ï¼2+98ï¼+ï¼3+97ï¼+......+ï¼49+51ï¼+50
=ï¼100÷2-1ï¼*100+50
=4900+50
=4950â´è¿ç¨å æ³äº¤æ¢å¾è¿è¡ç®ä¾¿è®¡ç®ã
0.88ï¼5.6ï¼0.12 1.78ï¼3.5ï¼0.22 5.6ï¼2.08ï¼14.4
ï¼0.88ï¼0.12ï¼5.6 ï¼1.78ï¼0.22ï¼3.5 ï¼5.6ï¼14.4ï¼2.08
ï¼1ï¼5.6 ï¼2ï¼3.5 ï¼20ï¼2.08
ï¼6.6 ï¼5.5 ï¼22.08
âµè¿ç¨å æ³ç»åå¾è¿è¡ç®ä¾¿è®¡ç®
2.3ï¼(0.56ï¼4.7) 28.6ï¼0.54ï¼0.46ï¼1.4 5.82ï¼4.56ï¼5.44
ï¼(2.3ï¼4.7)ï¼0.56 ï¼(28.6ï¼1.4)ï¼(0.54ï¼0.46) ï¼5.82ï¼(4.56ï¼5.44)
ï¼7ï¼0.56 ï¼30ï¼1 ï¼5.82ï¼10
ï¼7.56 ï¼31 ï¼15.82
â¶ãè¿ç¨ä¹æ³äº¤æ¢å¾è¿è¡ç®ä¾¿è®¡ç®ã
25Ã0.37Ã0.4 7.5Ã0.39Ã4 6.5Ã1.1Ã4 1.25Ã3.9Ã0.8
ï¼25Ã0.4Ã0.37 ï¼7.5Ã4Ã0.39 ï¼6.5Ã4Ã1.1 ï¼1.25Ã0.8Ã3.9
ï¼10Ã0.37 ï¼30Ã0.39 ï¼26Ã1.1 ï¼1Ã3.9
ï¼3.7 ï¼11.7 ï¼28.6 ï¼3.9
â·ãè¿ç¨ä¹æ³ç»åå¾è¿è¡ç®ä¾¿è®¡ç®ã
1.9Ã7.5Ã8 6.2Ã0.8Ã2.5 4.3Ã1.5Ã6 4.1Ã3.5Ã2
ï¼1.9Ã(7.5Ã8) ï¼6.2Ã(0.8Ã2.5) ï¼4.3Ã(1.5Ã6) ï¼4.1Ã(3.5Ã2)
ï¼1.9Ã60 ï¼6.2Ã2 ï¼4.3Ã9 ï¼4.1Ã7
ï¼114 ï¼12.4 ï¼38.7 ï¼28.7
â¸ãè¿ç¨ä¹æ³åé
å¾çå æ³è¿è¡ç®ç®ã
13.6Ã4.6ï¼4.6Ã6.4 0.72Ã23ï¼77Ã0.72 2.6Ã32ï¼32Ã2.4
ï¼(13.6ï¼6.4)Ã4.6 ï¼(23ï¼77)Ã0.72 ï¼(2.6ï¼2.4) Ã32
ï¼20Ã6.4 ï¼100Ã0.72 ï¼5Ã32
ï¼128 ï¼72 ï¼160
â¹ãè¿ç¨ä¹æ³åé
å¾çåæ³è¿è¡ç®ç®ã
12Ã5.9ï¼5.9Ã2 4.6Ã2.5ï¼2.5Ã0.6 101Ã9.7ï¼9.7
ï¼(12ï¼2) Ã5.9 ï¼(4.6ï¼0.6)Ã2.5 ï¼(101ï¼1)Ã9.7
ï¼(12ï¼2) Ã5.9 ï¼(4.6ï¼0.6)Ã2.5 ï¼(101ï¼1)Ã9.7
ï¼10Ã5.9 ï¼4Ã2.5 ï¼100Ã9.7
ï¼59 ï¼10 ï¼970
âºãè¿ç¨åæ³çè¿ç®è§å¾è¿è¡ç®ä¾¿è®¡ç®ã
1.8ï¼0.45ï¼0.55 54.4ï¼4.6ï¼5.4 35.6ï¼0.13ï¼0.47
ï¼1.8ï¼(0.45ï¼0.55) ï¼54.4ï¼(4.6ï¼5.4) ï¼35.6ï¼(0.13ï¼0.47)
ï¼1.8ï¼1 ï¼54.4ï¼10 ï¼35.6ï¼0.6
ï¼0.8 ï¼44.4 ï¼35
â»ãè¿ç¨é¤æ³çè¿ç®è§å¾è¿è¡ç®ä¾¿è®¡ç®ã
4.5÷4÷7.5 14.8÷1.25÷8 18.5÷4÷1.25 5.4÷4÷0.45
ï¼4.5÷(4Ã7.5) ï¼14.8÷(1.25Ã8) ï¼18.5÷(4Ã1.25) ï¼5.4÷(4Ã0.45)
ï¼4.5÷30 ï¼14.8÷10 ï¼18.5÷5 ï¼5.4÷0.18
ï¼0.15 ï¼1.48 ï¼3.7 ï¼30
â¼ç»¼åè¿ç¨åç§è¿ç®å®å¾è¿è¡ç®ç®ã
2.54ï¼2.46ï¼0.44ï¼0.54 10.7Ã0.4ï¼6.7Ã0.4 0.5Ã3.2Ã1.25
ï¼(2.54ï¼2.46)ï¼(0.44ï¼0.54) ï¼(10.7ï¼6.7)Ã0.4 ï¼(0.5Ã4)Ã(0.8Ã1.25)
ï¼5ï¼1 ï¼4Ã0.4 ï¼2Ã1
ï¼6 ï¼1.6 ï¼2
89.7ï¼5.8ï¼9.7ï¼4.2 99Ã0.38ï¼0.38 360÷(18Ã0.4)
ï¼(89.7ï¼9.7)ï¼(5.8ï¼4.2) ï¼(99ï¼1) Ã0.38 ï¼360÷18÷0.4
ï¼80ï¼10 ï¼100Ã0.38 ï¼20÷0. 4
ï¼90 ï¼38 ï¼50
4.8Ã12.5 2.5Ã1.6Ã12.5 3.2Ã102
ï¼0.6Ã(8Ã12.5) ï¼(2.5Ã0.2)Ã(8Ã12.5) ï¼3.2Ã(100ï¼2)
ï¼0.6Ã100 ï¼0.5Ã100 ï¼3.2Ã100ï¼3.2Ã2
ï¼60 ï¼50 ï¼320ï¼6.4
ï¼326.4
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