Topicmf8848776512f958b_1528449000663_0Topic

Writing double unit expressiondouble unit expressiondouble unit expression in a form of decimals

Levelmf8848776512f958b_1528449084556_0Level

Second

Core curriculummf8848776512f958b_1528449076687_0Core curriculum

IV. Common and decimals fraction. The student:

6) writes the double unit expressions in a form of decimal fractiondecimal fractiondecimal fraction and decimal fraction in a form of the double unit expressions;

XII. Practical calculation. The student:

6) converts and uses properly the units of length: the millimetre, the centimetre, the decimetre, the metre, the kilometre;

7) converts and uses properly the units of mass: gram, decagram, kilogram, tonne;

Timingmf8848776512f958b_1528449068082_0Timing

45 minutes

General objectivemf8848776512f958b_1528449523725_0General objective

Reading, interpreting and processing the date presented in the various forms.

Specific objectivesmf8848776512f958b_1528449552113_0Specific objectives

1. Writing the double unit expressions in a form of decimal and decimal in a form of the double unit expressions.

2. Converting the units of the length and the mass.

3. Communicating in English; developing mathematical and basic scientific, technical and digital competences; developing learning skills.

Learning outcomesmf8848776512f958b_1528450430307_0Learning outcomes

The student:

- writes the double unit expressions in a form of decimal and decimal in a form of the double unit expressions,

- converts the units of the length and the mass.

Methodsmf8848776512f958b_1528449534267_0Methods

1. Learning game.

2. Situational analysis.

Forms of workmf8848776512f958b_1528449514617_0Forms of work

1. Individual work.

2. Group the work.

Lesson stages

Introductionmf8848776512f958b_1528450127855_0Introduction

Teacher prepares a set of 36 cards for each group. There is one of the following expression on each card: 1PLN, 100 gr, 1 gr, 0.01PLN, 1 t, 1,000 kg, 1 kg, 0.001 t, 1 kg, 1,000 g, , 1 g, 0.001 kg, 1 kg, 100 dag, 1 dag, 0.01 kg, 1 dag, 10 g, 1 g, 0,1 dag, 1 km, 1,000 m, 1 m, 0.001 km, 1 m, 100 cm, 1 cm, 0.01 m, 1 dm, 10 cm,
1 cm, 0.1 dm, 1 cm, 10 mm, 1 mm, 0.1 cm,

The students revise the dependencies between the monetary units and the units of length and mass by taking part in the Memory game.

Students work in groups of four‑five . They sit around the table and put the cards in front of them the writing side face‑down. The one student takes two cards. If the expressions written in them are equalequalequal he puts them away and takes another two. If the expressions are not equal he covers them and finishes his turn. The student on his left continues the game. The game is finished when all the cards are found.

Proceduremf8848776512f958b_1528446435040_0Procedure

The teacher introduces the topic of the lesson: writing the double unit expressions in the form of decimal fractiondecimal fractiondecimal fraction and the decimal fraction in a form of the double unit expressions.

The students work individually using their computers. They are going to analyse the slideshow concerning the double unit expressions.

[Interactive graphics]

The students use the information they have gained to write the double unit expressions in a form of the decimal fraction and the decimal fractions in a form of the double unit expressions. They compare the results they have gained.

Task 1

Write the expressions below by using the decimal fractions.

a) 17 PLN 5 gr = … PLN

b) 1 m 68 cm = … m

c) 8 kg 25 g = … kg

d) 9 cm 1 mm = … cm

e) 45 km 60 m = … km

f) 3 t 25 kg = … t

Task 2

Write the given numbers by using the double unit expressions.

a) 7.9 PLN= … zł … gr

b) 75.5 km = … km … m

c) 3.2 dm = … dm … cm

d) 15.01 kg = … kg … g

e) 32.7 cm = … cm … mm

f) 6.05 kg = … kg … dag

The students work in pairs completing the tasks with the double unit expressions.

Task 3

Compare the values of the presented expressions filling the gap with the appropriate sign of greater than, less than, equal.mf8848776512f958b_1527752263647_0Compare the values of the presented expressions filling the gap with the appropriate sign of greater than, less than, equal.

a) 73,4 km … 73 km 40 m

b) 56 kg 300 g … 56.3 kg

c) 38.4 PLN … 38 PLN 4 gr

Task  4

Kate is 1 m 53 cm tall. Her brother is taller by 0,11 m than Kate and her sister is shorter by 7 cm than Kate.

a) How tall are Kate’s brother and sister?

b) How many centimetres is Kate’s sister shorter than Kate’s brother?

An extra task:

Find out on the Internet the information about micrometres and nanometres. Complete the gaps with the appropriate numbers.

a) 3 m 456 μm = … m

b) 6,000013 m = … m … μm

c) 15,00000007 m = … m … nm

d) 8 m 350 000 nm = … m.

Lesson summarymf8848776512f958b_1528450119332_0Lesson summary

The students do the summarising tasks.

Then they sum up the class drawing the conclusions to memorise:

- The mono unit expressions are written by using only one unit.
- The double unit expressions are written by using two units of the same type. mf8848776512f958b_1527752256679_0- The mono unit expressions are written by using only one unit.
- The double unit expressions are written by using two units of the same type. 

Selected words and expressions used in the lesson plan

decimal fractiondecimal fractiondecimal fraction

double unit expressiondouble unit expressiondouble unit expression

equalequalequal

greater thangreater thangreater than

less thanless thanless than

monetary unitmonetary unitmonetary unit

mono unit expressionmono unit expressionmono unit expression

unit of lengthunit of lengthunit of length

unit of massunit of massunit of mass