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