数学题脱式计算

脱式计算（一）
9.4+0.3－6.4 34.82－（4.82+15.2） 15.25+4.72+4.75+5.28
=9.4-6.4+0.3 =34.82-4.82-15.2 =(15.25+4.25)+(4.72+5.28)
=3+0.3 =30-15.2 =20+10
=3.3 =14.8 =30

12.7－4.8－5.2 3.1+25.78+6.9 73.8－1.64－13.8－5.36
=12.7-(4.8+5.2) =25.78+(3.1+6.9) =(73.8-13.8)-(1.64+5.36)
=12.7-10 =25.78+10 =60-7
=2.7 =35.78 =53

8.053.4+7.6 (1.25－0.125)8 4.8100.1 56.599＋56.5
=(8+0.05)×3.4+7.6 =1.25×8-0.125×8 =4.8×(100+0.1) =56.5+0.099+56.5
=26.4+0.017+7.6 =10-1 =480-0.48 =56.5×2+0.099
=26.4+7.6+0.017 =9 =479.52 =113+0.099
=34+0.017 =113.99
=34.017
脱式计算（二）

7.0910.8－0.87.09 (9.37+9.37+9.37+9.37) 2.5
=7,08(10.8-0.8) =4*9.37*2.5
=7.09 ×10 =10*9.37
=70.9 =93.7

0.68 （5.2 -3.5） 1.25 9.28×13－9.28×4＋9.28
=0.68/1.7 ×(1.25) =9.28*(13-4+1)
=0.4 ×1.25 =9.28*10
= 0.5 =92.8

0.25×0.57×8 63.4÷2.5÷0.4 0.85×99
=0.25*4*2*0.57 =63.4÷(2.5*0.4) =0.85 ×(100-1)
=1*2*0.57 =63.4÷1 =0.85×100-0.85
=1.14 =63.4 =85-0.85
=84.15

（2.5－0.25）×0.4 3.6－3.6×0.5 9.16×1.5－0.5×9.16
=2.5×0.4-0.25×0.4 =3.6 ×(1-0.5) =9.16 ×(1.5-0.5)
=1-0.1 =0.9 ×4 ×0.5 =9.16 ×1
=0.9 =0. 9 ×2 =9.16
=1.8

3.9÷（1.3×5） 52.5×0.63＋3.7×5.25 9.5101
= 3.9 ÷1.3 ÷5 =5.25×(0.63×10+3.7)
=3÷5 =5.25×10
=0.6 =52.5

脱式计算（一）
9.4+0.3－6.4 34.82－（4.82+15.2） 15.25+4.72+4.75+5.28
=9.4-6.4+0.3 =34.82-4.82-15.2 =(15.25+4.25)+(4.72+5.28)
=3+0.3 =30-15.2 =20+10
=3.3 =14.8 =30

12.7－4.8－5.2 3.1+25.78+6.9 73.8－1.64－13.8－5.36
=12.7-(4.8+5.2) =25.78+(3.1+6.9) =(73.8-13.8)-(1.64+5.36)
=12.7-10 =25.78+10 =60-7
=2.7 =35.78 =53

8.053.4+7.6 (1.25－0.125)8 4.8100.1 56.599＋56.5
=3.4x8+3.4x0.05+3.4x2+0.8 =1.25x8-0.125x8 =4.8x100+4.8x0.1 =56.5x2+0.099+56.5
=3.4x(8+2)+0.17+0.8 =1-0.1 =480.48 =113+0.099
=34.97 =0.9 =113.099

脱式计算（二）

7.0910.8－0.87.09 (9.37+9.37+9.37+9.37) 2.5
=7.09x(10.8-0.8) =4*9.37*2.5
=7.09x10 =10*9.37
=70.9 =93.7

0.68 （5.2 -3.5） 1.25 9.28×13－9.28×4＋9.28
=0.68/1.7*1.25 =9.28*(13-4+1)
=0.4*1.25 =9.28*10
=0.5 =92.8

0.25×0.57×8 63.4÷2.5÷0.4 0.85×99
=0.25*4*2*0.57 =63.4÷(2.5*0.4) =0.85 ×(100-1)
=1*2*0.57 =63.4÷1 =0.85×100-0.85
=1.14 =63.4 =85-0.85
=84.15

（2.5－0.25）×0.4 3.6－3.6×0.5 9.16×1.5－0.5×9.16
=2.5×0.4-0.25×0.4 =3.6 ×(1-0.5) =9.16 ×(1.5-0.5)
=1-0.1 =0.9 ×4 ×0.5 =9.16 ×1
=0.9 =0. 9 ×2 =9.16
=1.8
3.9÷（1.3×5） 52.5×0.63＋3.7×5.25 9.5*101
= 3.9 ÷1.3 ÷5 =5.25×(0.63×10+3.7) =9.5*100+9.5*1
=3÷5 =5.25×10 =959.5
=0.6 =52.5

脱式计算（一）
9.4+0.3－6.4 34.82－（4.82+15.2） 15.25+4.72+4.75+5.28
=9.4-6.4+0.3 =34.82-4.82-15.2 =(15.25+4.75)+(4.72+5.28)
=3+0.3 =30-15.2 =20+10
=3.3 =14.8 =30

12.7－4.8－5.2 3.1+25.78+6.9 73.8－1.64－13.8－5.36
=12.7-(4.8+5.2) =25.78+(3.1+6.9) =(73.8-13.8)-(1.64+5.36)
=12.7-10 =25.78+10 =60-7
=2.7 =35.78 =53

8.05×3.4+7.6 (1.25－0.125)×8 4.8×100.1 56.599＋56.5
=3.4x8+3.4x0.05+3.4x2+0.8 =1.25x8-0.125x8 =4.8x100+4.8x0.1 =56.5x2+0.099+56.5
=3.4x(8+2)+(0.17+0.8) =10-1 =480+0.48 =113+0.099
=34+0.97 =9 =480.48 =113.099
=34.97

脱式计算（二）

7.09×10.8－0.8×7.09 (9.37+9.37+9.37+9.37) 2.5
=7.09x(10.8-0.8) =4×9.37×2.5
=7.09x10 =10×9.37
=70.9 =93.7

0.68 ÷（5.2 -3.5）×1.25 9.28×13－9.28×4＋9.28
=0.68/1.7×1.25 =9.28*(13-4+1)
=0.4×1.25 =9.28*10
=0.5 =92.8

0.25×0.57×8 63.4÷2.5÷0.4 0.85×99
=0.25*4*2*0.57 =63.4÷(2.5*0.4) =0.85 ×(100-1)
=1*2*0.57 =63.4÷1 =0.85×100-0.85
=1.14 =63.4 =85-0.85
=84.15

（2.5－0.25）×0.4 3.6－3.6×0.5 9.16×1.5－0.5×9.16
=2.5×0.4-0.25×0.4 =3.6 ×(1-0.5) =9.16 ×(1.5-0.5)
=1-0.1 =0.9 ×4 ×0.5 =9.16 ×1
=0.9 =0. 9 ×2 =9.16
=1.8
3.9÷（1.3×5） 52.5×0.63＋3.7×5.25 9.5*101
= 3.9 ÷1.3 ÷5 =5.25×(0.63×10+3.7) =9.5*100+9.5*1
=3÷5 =5.25×10 =959.5
=0.6 =52.5

(1)3.3 15.2 30 2.7 35.78 53 这不清 9 这不清 113.099
（2）这不清 93.7 这不清 92.8 1.14 63.4 84.15 0.9 1.8 9.16 15 52.5或5.25 这不清

脱式计算（一）

9.5+0.3－6.5
=9.8-6.5
=3.3
34.82－（4.82+15.2）
=34.82-4.82-15.2
=30-15.2
=14.8
15.25+4.72+4.75+5.28
=（15.25+4.75）+（4.72+5.28）
=20+10
=30

12.7－4.8－5.2
=12.7-（4.8+5.2）
=12.7-10
=2.7
3.1+25.78+6.9
=（3.1+6.9）+25.78
=10+25.78
=35.78
73.8－1.63－13.8－5.37
=（73.8-13.8）-（1.63+5.37）
=60-7
=53