陶小凡 -
1)4.75-9.64+8.25-1.36
=(4.75+8.25)-(9.64+1.36)
=13-11
=2
2)3.17-2.74+4.7+5.29-0.26+6.3
=(3.17+5.29)+(4.7+6.3)-(2.74+0.26)
=8.46+11-3
=16.46
3)(5.25+0.125+5.75)×8
=(5.25+5.75)×8+0.125×8
=11×8+1
=89
4) 34.5×8.23-34.5+2.77×34.5
=(8.23+2.77-1)×34.5
=10×34.5
=345
5)6.25×0.16+264×0.0625+5.2×6.25+0.625×20
=(0.16+2.64+5.2+2)×6.25
=10×6.25
=62.5
6)0.035×935+0.035+3×0.035+0.07×61×0.5
=(935+3+61)×0.035
=999×0.035
=1000×0.035-0.035
=34.965
7)19.98×37—199.8×1.9+1998×0.82
=(3.7-1.9+8.2)×199.8
=10×199.8
=1998
8)13.5×9.9+6.5×10.1
=13.5×10-13.5×0.1+6.5×10+6.5×0.1
=(13.5+6.5)×10-1.35+0.65
=200-0.7
=199.3
9)0.125×0.25×0.5×64
=(1/8)×(1/4)×(1/2)×64
=(1/64)×64
=1
10)11.8×43-860×0.09
=11.8×43-43×20×0.09
=(11.8-1.8)×43
=10×43
=430
11)32.14+64.28×0.5378×0.25+0.5378×64.28×0.75-8×64.28×0.125×0.5378
=32.14+(0.25+0.75-8×0.125)×0.5378×64.28
=32.14+0×0.5378×64.28
=32.14
12)0.888×125×73+999×3
=125×0.8×73+125×0.08×73+125×0.008×73+1000×3-3
=(100+10+1)×73+3000-3
=8103+3000-3
=11100
13)1998+199.8+19.98+1.998
=2000-2+200-0.2+20-0.02+2-0.002
=2222-2.222
=2219.778
14) 1000....[总共2000个0]×a=12500 1000....[总共2000个0]×b=8
a+b=0.000...[总共1996个0]12508
a-b=0.000...[总共1996个0]12492
a×b=0.000...[总共3993个0]1
a÷b=1.25÷0.0008=1562.5
王木生 -
1=4.75+8.25-（9.64+1.36）=13-11=2
2=3.17+（4.7+6.3）-（2.74+0.26）=3.17+10-3=10.17
3=（5.25+5.75+0.125）*8=11*8+0.125*8=88+1=89
4=34.5*（8.23+2.77-1）=34.5*10=345
5=6.25*0.16+2.64*6.25+5.2*6.25+6.25*2=6.25*（0.16+2.64+5.2+2）=6.25*10=62.5
6=0.035*（935+3+61+1）=0.035*1000=35
7=19.98*37-19.98*19+19.98*82=19.98*（37-19+82）=19.98*100=1998
8=13.5*（10-0.1）+6.5*（10+0.1）=135-1.35+65+0.65=69.3
9=0.125*8*0.25*4*0.5*2*=1*1*1=1
10=11.8*43-86*0.9=11.8*43-43*2*0.9=43*（11.8-1.8）=430
11=32.14+64.28*0.5378*（0.25+0.75-1）=32.14+0=32.14
12=111*8*1.25*7.3+111*9*3=111*73+111*27=111*（73+27）=111*100=11100
13=2000-2+200-0.2+20-0.02+2-0.002=2220-0.222=2219.778
14题 你把a和b放大2000个零 算出 a+b a-b a*b a/b 然后再缩小2000个零 就可以了
这些题 很简单 希望你自己能好好思考下 别投机取巧