84÷42= 600-50= 500×3= 0×930= 27×30=

84÷ 12= 420÷3= 9 10÷3= 30÷ 10= 13×4=

25×20= 160×4= 300÷5= 720÷9= 16×6=

720÷0= 180÷20= 900÷90= 10×40= 12×5=

85÷5= 57÷3= 0+8= 32×3= 70÷5=

25×4= 15×6= 630÷9= 450÷5= 12×40=

240÷6= 16×60= 9 1-59= 1 1×70= 1000÷5=

75÷ 15= 320- 180= 30×40= 40+580= 560÷4=

95÷ 1= 480+90= 5 10÷7= 200÷4= 72÷4=

8000÷2= 102+20= 4000÷50= 125-25×2= 50×0×8=

75+25÷5 = 32÷47× 12 = 45+55÷5 = 70×(40-32)= 90÷5×3 = 10÷ 10 x30 = 6×( 103-98)= 7+3×0 = 5 1-4×6 = 420÷2×8 =

750-(70+80)= 300÷2÷5=

Second, write calculations.

54×63= 25×38= 36× 19= 774÷8=

508÷2= 370÷5= 19×47= 900÷5=

23×34= 392÷4= 360×5= 32×68=

203÷9= 63×36= 26×38= 770÷5=

696÷2= 882÷4= 809÷8= 56×79=

64×28= 820÷3= 630÷6= 458÷4=

4+0.6= 7.3-2.9= 10-0.7= 8.2-5=

6.5+4.7= 1.2-0.3= 4.6+2.4= 3.8+6.6=

Three. estimate

890÷9≈ 459÷50≈ 4 17÷60≈ 35 1÷5≈ 238÷6≈

876÷3≈ 4 17÷6≈ 753÷5≈ 89×30≈ 32×48≈

43×22≈ 52×68≈ 65× 1 1≈ 76× 1 1≈ 27× 19≈

45× 19≈ 53×2 1≈ 84×2 1≈ 38×2 1≈ 35×2 1≈

Fourth, calculation and conversion

48 months = () years and 35 days = () Thursday at 4: 20 = () minutes.

May = () days 300 hectares = () square kilometers 3 square meters = () square decimeter.

32 square decimeter = () square centimeter 3 centimeter = () decimeter 138 second = () minute () second.

5 years = () month 80000 square meters = () hectares 3 days = () hours.

1 yuan 2 cents = () yuan 6 cm = () meters 13 square kilometers = () hectares.

1990 is () February, with () days, and 9 decimeters = () meters.

6.02m = () m () decimeter () cm 1.6 yuan = 1( )6 ().

Verb (abbreviation for verb) is not a type calculation

3 15-345÷3 574÷( 125- 1 18) 948- 13×52 439+46×7 248÷4× 18 67×(96÷6) 25× 17- 120 ( 450- / kloc-0/75)÷5 268+29×65 17×36÷3 560- 12×24 375÷5×24

Intransitive verbs compare sizes and fill in ""or "=".

1)246÷3 492÷6

2)240÷5 246÷6

3)600÷4 700÷5

4)0.2 0.02

5)0.4 1 0. 14

6)3.5 3.47

7) 1.2 0.98

8) 1.4 1.36

9) 1.08 0.99

10)3.58 3.54

1 1)7.0 1 7. 10

Seven, column calculation

What is the difference between 1 and 400 minus the sum of 170 and 80?

2. What is the quotient of16 and 24 divided by 8?

14 times 3 and 64 MINUS 522. What's the difference?

How many times is the sum of 4748 and 1 16?

What is the product of 5,25 times 5 divided by 225?

How much is 6.6 752 less than 5 172?

What is the product of the sum of 7, 25 and 47 multiplied by 98?

8. What is the quotient of the sum of175 and 49 divided by 4?

9. What is the quotient of195 divided by 32 minus 27?