一.计算
1、直接写出结果:
2.2+3.57= 1.125×8= 35×= 4- = 2÷=
1--= += 3.25×4= 1×8+8×=
3.8+6.2= 8.1÷3×2= 568-198= 0.65÷1.3=
75×10%=
0.8×0.6= 0.9+99×0.9= 1÷= ×= +=
9÷= 3.3-0.7= 7.2÷8×4= 3.25×4= 2-=
636+203= 568-198= 0.6×1.5 = 0.875×24 = 10÷0.1=
2.2+1.08= 72 × = += ÷= 1÷-÷1=
7÷1.4= 16.5+4.7= 3.9×0.2= 760+93= 0.9-0.26=
+= -= ×= 2-= 0÷÷=
(+)×8= 4+= 1.88+1.2= 46-0.13= 200×0.2%=
7.2÷8= 400÷25÷8= += 2-= ×=
÷3= ( -)×12= 7-7×= += 10-0.13=
0.37+9.63= += -0.06= (+)÷ = 2-2×=
+= ( 4+)×8= ÷3÷= 4+= =
-= 2000-199= 5÷7= 18.6÷0.01= 10--=
1-98%= 1-×= 12×(+)= 4.2+1.68= 1÷3=
A+0= A×0= A÷0= A-0= A×1= A÷A= A-A= A÷1= 1÷A= A+A+A= A×A×A= A÷A÷A= 2A+= A×= A÷3=
2B+2A= X-= -= 3.6B-0.6B=
+= 2%A+A= += A×A= 2%A×A=
1+2%= 88+1111= 2.6万+4.4万= 2.4-= 25%×4 =
0.66+0.66= 9+= 92.6+7.4= 3.57+2.2= 1-95%
99+111= +4= 207%+0.73= 0.2+= 20×1%= += += += 0.37+1.6= +=
0+= 8.37-1.6= 1-0.25= 7- = 1-1%= 1-=
1.4-0.6= 1-98%= :6= 1÷ 0.1万 42-32=
5.38-(1.8+2.38)= 0.25×(2.6-2.4) = 4.9+120+5.1= (0.99+0.9)÷9= 4.29-(9.5-5.71)= ×2÷×2=
6--= 7-7×= +×0= ++-=
4.27+(5.73+6) = 8÷-×8= ++= 15×(1-)=
(-)×18= (0.6+1.5)×4= -+= 0÷×=
32+11= ×8+8×= 4.33-33%-4= 1-+= (-)×15= 5.4×80%×0= (+)×3×4= 0÷99÷1000=
2、脱式计算:
1.9+0.1-1.9+0.1= ×[ —( —0.25)] +-
[1.9—1.9×(1.9—1.9)]+1.9 8× 3÷[1÷(3-2.95)] 3060÷15-2.5×1.04
(+)÷+ +×÷2 ×〔-(- )〔11.4+8.6×(2.8-1.3)〕÷3 〔1- (0.5+)÷×0.75〕 (+)×45
(+)×6+7÷13 1÷〔 (-0.05)×〕 1800× (1-99%)÷13×
〔2- (-1.5)×〕÷ 〔÷(+)〕÷(1-) (—)÷
÷〔 (+)×〕- 0.÷(-4.5)+ ÷0.4 × (+3÷8)
(5+221)÷〔 56×(-)〕 〔 (+)÷+〕×250% +×13
〔 16× +(1-)〕÷ ×〔 20-(-)÷25%〕 30÷(—)
÷〔 (+)×〕- 4.67-(2.98+0.67) 46×
1110÷〔56× (-)〕× 〔÷(+)〕÷(1-) ×÷
20×(+-) 1—÷
-+
÷(+) 375+450÷18×25 ÷÷9 1-[-(-)]
÷(3——) (+)÷ ×56÷ 49×
(2296+7344÷36)×2.4 +++ ×3.8 - 3.8× 45÷0.8÷1.25
(+)÷+ +× (+)× ÷[—(+)]
3.6÷[ (1.2+0.6)×5] ×(-÷) ×+÷9 ×99+
2.375++5.625+ ×+× ×(+) 7.5×102
+×35+×0.6 7.19―2.17―4.83 32 ×1.25×2.5 1800÷25
+++ ×+×+×20% -+ 1.25×92
101×101-101 ( -)×+- 9.9+99.9+999.9 +0.3
18.74-(6.92+8.74) 36.5×0.69+6.35×6.9 13.71+(4.375+9,29+5.625)
0.98×101-0.98 ×+÷ 125×2.5×3.2 ×25-×10
12.5×4×2.5×8×0.3 45.6-35.81+24.4-5.19 100.47-(47%+50)
45.6+35.81+24.4+54.19 2043-198 19.8+86.43+20.2+57%
9.27-(3.5-0.73) 99.25-(25%-50) +3.73++6.27
+++ 95+++++ 345+298 345-2
3.求未知数x
∶12=X∶ =30%
5 X+3.25×4=17 ⅹ-ⅹ=10 3ⅹ-38=112 =
1.25∶0.25= X ∶1.6 X +X=42 4X-2.5×4=1.5 X ∶= ∶4
ⅹ-10%=18 6ⅹ-2.1×4=9.6 7ⅹ+4.2=5.6 2ⅹ÷5=
1.9ⅹ-0.6ⅹ=1.69 4×(0.8+ⅹ) =7.2 (ⅹ-7)÷3=8 :ⅹ =:
2ⅹ+30%ⅹ=9.2 0.25ⅹ-× =1 5ⅹ÷1.25=0.8 1-ⅹ =
ⅹ+ⅹ= 2ⅹ+7 =9 ⅹ:=: 1.69÷(ⅹ-2)=1.3
2ⅹ+48ⅹ=150 3ⅹ-0.6 =2.1 (1-45% ) ⅹ= 1÷(ⅹ+)=
12-2ⅹ=4 ⅹ+0.9 =6 50%ⅹ-ⅹ=5 3 :=:ⅹ
19-120%ⅹ=7 ⅹ-ⅹ =2 (ⅹ+4)÷7=6 ⅹ+4÷7=6
4、互化单位:
3060千克=( )吨( )千克; 25.8时=( )日( )时( )分 0.5公顷=( )平方米; 立方米=( )升( )毫升; 300平方厘米=( )平方米; 6.05吨( )=吨( )千克; 一瓶可乐饮料的容量是1250( );李林身高158( ),体重46( );96小时=( )天; 3平方千米=( )公顷=( )平方米; 75分=( )小时; 75立方分米=( )升=( )毫升 ;9.47吨=( )吨( )千克; 1.6平方千米=( )公顷=( )平方米; 3.7米=( )厘米 ;
75000毫升=( )升=( )立方米 4立方米60立方分米=( )立方米;
公顷=( )平方米; 3040千克=( )吨; 8000毫升=( )升; 103厘米=( )米
第四季度有( )天; 4.25小时=( )小时( )分; 3立方米=( )立方分米;
4千克30千克=( )千克; 20分=( )时; 15公顷=( )平方米;
4800立方厘米=( )立方分米=( )升. ;2小时15分=( )小时 ;
8.07千克=( )千克( )克 2小时15分=( )分 ;8.07千克= ( )克
5、填恰当的数:
( )÷16=0.875=7:( )= =( )%; ( ):6=0.375= ( )÷8= =( )%
15÷( )= ( )%==0.625=( ):56; 0.125==3:( )=4÷( )= ( )%