脱式计算．（1）[（7.6-5.2）÷0.4+2.54]×3.2；（2）0.125×14+1.875÷4；（3）（12-15-16）×30；（4）97×5996；（5）12+16+112+120+130+142+156+172；（6）2222×4444+8888×8889．

Question

脱式计算．
（1）[（7.6-5.2）÷0.4+2.54]×3.2；             
（2）0.125×(1)/(4)+1.875÷4；
（3）（(1)/(2)-(1)/(5)-(1)/(6)）×30；                      
（4）97×(59)/(96)；
（5）(1)/(2)+(1)/(6)+(1)/(12)+(1)/(20)+(1)/(30)+(1)/(42)+(1)/(56)+(1)/(72)；          
（6）2222×4444+8888×8889．

Answer 1

（1）[（7.6-5.2）÷0.4+2.54]×3.2
=[1.4÷0.4+2.54]×3.2
=[3.5+2.54]×3.2
=6.04×3.2
=19.328；

（2）0.125×(1)/(4)+1.875÷4
=0.125×(1)/(4)+1.875×(1)/(4)
=（0.125+1.875）×(1)/(4)
=2×(1)/(4)
=(1)/(2)；

（3）（(1)/(2)-(1)/(5)-(1)/(6)）×30
=(1)/(2)×30-(1)/(5)×30-(1)/(6)×30
=15-6-5
=9-5
=4；

（4）97×(59)/(96)
=（96+1）×(59)/(96)
=96×(59)/(96)+1×(59)/(96)
=59+(59)/(96)
=59(59)/(96)；

（5）(1)/(2)+(1)/(6)+(1)/(12)+(1)/(20)+(1)/(30)+(1)/(42)+(1)/(56)+(1)/(72)
=1-(1)/(2)+(1)/(2)-(1)/(3)+(1)/(3)-(1)/(4)+(1)/(4)-(1)/(5)+(1)/(5)-(1)/(6)+(1)/(6)-(1)/(7)+(1)/(7)-(1)/(8)+(1)/(8)-(1)/(9)
=1-(1)/(9)
=(8)/(9)；

（6）2222×4444+8888×8889，
=2222×4×1111+8888×8889，
=8888×1111+8888×8889，
=8888×（1111+8889），
=8888×10000，
=88880000．