小学五年级下册数学计算题 10
25*32*125==25*4*(8*125)=100*1000=100000
999*42+42=(999+1)*42=42000
(8700+870+87)÷87 =8700÷87+870÷87+87÷87=100+10+1=111
五十二又二十五分之十一×79.45+159×47.56+七十九又二十分之十一×52.44 =52.44×79.45+159×47.56+79.55×52.44 =52.44×(79.45+79.55)+159×47.56 =52.44×159+159×47.56 =159×(52.44+47.56) =159×100 =15900
一又二分之一-六分之五+十二分之七-二十分之九+三十分之十一-四十二分之十三+五十六分之十五(根据提示,1又1/2=1+1/2,+1/2+1/3=5/6……) =(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+ 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+1/8 =9/8
2002+2001-2000-1999+1998+1997-1996-1995+……+2+1 =(2002-2000)+(2001-1999)+(1998-1996)+(1997-1995)+……+(6-4)+(5-3)+2+1 =2+2+2+2+……+2+2(从3-2002共2000个数,所以有1000个2)+2+1 =1000×2+2+1 =2003
(1/69+2/71)乘23+25除以71 =1/69*23+2/71*23+25/71=1/3+(46/71+25/71)=1/3+1=4/32.(1+1/2)乘(1-1/2)乘(1+1/3)乘(1-1/3)乘........乘(1+1/9)乘(11/9) =3/2*1/2*4/3*2/3...*10/9*8/9=1/2*10/9(中间的都约去了)=5/93.1/2乘3+1/3乘4+.......+1/19乘20 =1/2-1/3+1/3-1/4+...+1/19-1/20=1/2-1/20=9/204.1/27+505/2727+131313/272727 =1/27+5*101/(27*101)+13*10101/(27*10101)=1/27+5/27+13/27=19/275.100-98+96-94+....+4-2=(100-98)+(96-94)+...(4-2)=2+2+...+2(共有25个)=2*25=50 这是我在静心思考后得出的结论,如果能帮助到您,希望您不吝赐我一采纳~(满意回答)如果不能请追问,我会尽全力帮您解决的~答题不易,如果您有所不满愿意,请谅解
=3333*3334+3333*6666
=3333*(3334+6666)
=3333*10000
=33330000
0.54÷0.6= 3.1-2.9= 0.12÷3= 0.4×0.7=
0.32×1000= 7÷100= 0.8*0.02= 0.84÷0.3
3.68÷0.01= 9+1.5= 0.4×0.5= 0.44+0.6=
2.5×0.4= 0.125×8= 3.6÷0.4= 3.92+7.2=
8.7×10.1 7.06×2.4-5.7 6.35÷0.8÷1.25
2.5×6.8×0.4 2.5×3.2×1.25 21.36÷0.8×2.9
102×0.45 8.27+7.52+1.73-3.52 0.79×99+0.79
0.15+ 0.75×18 72+8÷2.5-30.2 2.8×3.2+3.2×7.2
我刚上完五年级······有书,五上和五下
你出题
额,