200道有答案的简算.求助啊求助啊!五年级的.

200道有答案的简算.求助啊求助啊!五年级的.
200道有答案的简算.求助啊求助啊!五年级的.

200道有答案的简算.求助啊求助啊!五年级的.
6.4*（0.125*2.5）
=0.125×8×2.5×8
=1×20
=20
1.25*（4-0.8）
=1.25×4-1.25×0.8
=5-1
=4
63*10.1
=63×10+63×0.1
=63+0.63
=63.63
4.86*99
=4.86×100-4.86
=486-4.86
=481.14
70.1*9.9
=70.1×10-70.1×0.1
=701-7.01
=693.99
100.1+100.1*99
=100.1×100
=10010
2.5*4.4
=2.5×4×1.1
=10×1.1
=11
3.64*0.8+6.36*0.8-3.8
=（3.64+6.36）×0.8-3.8
=8-3.8
=4.2
60.7×0.6
=(60+0.7)*0.6
=36+0.42
=36.42
7.8/[32*八分之三+3.6]
=7.8/(12+3.6)
=0.5
3/5+2/5*(1-3/8)
=3/5+2/5*5/8
=3/5+1/4
=17/20
4/一又三分之二+6*五分之三
=7/3+18/5
=89/15
五分之一/[(三分之二+五分之一)*十三分之一]
=(1/5)/(1/15)
=3
九分之四/(三分之一+六分之一)*四分之三
=4/9/1/2*3/4
=2/3
76*七十四分之五
=(74+2)*5/74
=74*(5/74)+2*5/74
=5+5/37
=五又三十七分之五11.
0.25*39+10.1*3.7=0.25*(40-1)+(10+0.1)*3.7=0.25*40-0.25*1+3.7*10+3.7*0.1=10-0.25+3.7*10+0.37
=10*(1+3.7)+0.37-0.25=47.12
12.
3.6*100.1-2.34*9.9=3.6*(100+0.1)-2.34*(10-0.1)=360+0.36-23.4+0.234=336.6+0.594=337.194
13.
14.02-3.5+0.98-6.5=14.02+0.98-(6.5+3.5)=15-10=5
14.
999.8+99.8+9.8+0.2*3=999.8+0.2+99.8+0.2+9.8+0.2
=1000+100+10=1110
15.
180/125+7/2.5=180/125+7*50/(2.5*50)=(180+350)/125=530/125=106/25
16.
457*9.9+45.7=457*9.9+457*0.1=457*(9.9+0.1)=457*10=4570
17.
0.456*101-45.6=0.456*101-0.456*100=0.456*(101-100)=0.456
18.
1.248*125*0.4*20=1.248*(125*0.4)*20=1.248*50*20=1.248*1000=1248
19.
1.5+1.5/3-6*0.2=1.5+0.5-1.2=0.8
20.
(1.5+1.5)/3+6/0.2=1+30=31
1.(5/12+4/9)*36=5/12*36+4/9*36=15+16=31
2.56又12分之7乘7分之2=(56+7/12)*2/7=56*2/7+7/12*2/7=16+1/6=16又1/6
3.12分之11+56分之9除以7分之3+8分之5=11/12+(9/56)*(7/3)+5/8=11/12+3/8+5/8=11/12+1=1又11/12
4.5/9-5/9*1/4=5/9（1-1/4）=5/12
5.3.25乘6-3又4分之1+3.25除5分之1=3.25*6-3又能/4+3.25*5=3.25*11-3又1/4=3.25*10+3.25-3又1/4=3.25*10=32.5
5/6+1/2×5/12
＝2×5/12＋1/2×5/12
=(2+1/2)×5/12
＝5/2×5/12
＝25/24
＝1又1/24
15×1/6-4/15
＝2又1/2－4/15
＝2＋（1/2－4/15）
＝2＋7/30
＝2又7/30
1.6÷ 3/8 – 3/8 ÷6
=1/6x(3/8-3/8)
=1/6x0
=0
2.4/7 × 5/9 + 3/7 × 5/9
=(4/7+3/7)x5/9
=1x5/9
=5/9
3.5/2 -（ 3/2 + 4/5 ）
=5/2-3/2-4/5
=1-4/5
=1/5
4.6 ×（ 1/2 + 2/3 ）
=6x1/2+6x2/3
=3+4
=7
5.8 × 4/5 + 8 × 11/5
=8x(4/5+11/5)
=8x3
=24
6.31 × 5/6 – 5/6
=(31-1)x5/6
=30x5/6
=25
7.4/5 × 25/16 + 2/3 × 3/4
=5/4+1/2
=5/4+2/4
=7/4
8.101 × 1/5 – 1/5 × 21
=(101-21)x1/5
=80x1/5
=16
1.3/7 × 49/9 - 4/3
2.8/9 × 15/36 + 1/27
3.12× 5/6 – 2/9 ×3
4.8× 5/4 + 1/4
5.6÷ 3/8 – 3/8 ÷6
6.4/7 × 5/9 + 3/7 × 5/9
7.5/2 -（ 3/2 + 4/5 ）
8.7/8 + （ 1/8 + 1/9 ）
9.9 × 5/6 + 5/6
10.3/4 × 8/9 - 1/3
11.7 × 5/49 + 3/14
12.6 ×（ 1/2 + 2/3 ）
13.8 × 4/5 + 8 × 11/5
14.31 × 5/6 – 5/6
15.9/7 - （ 2/7 – 10/21
我知道不够,但将就下吧