rounding decimals use the number line to round these ...€¦ · 14.5 14 15 the nearest whole...

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Rounding decimals 1 Show the position of each number on the number line. Use the number line to round these decimals to the nearest whole number. a) 7.2 7.5 7 8 The nearest whole number is b) 14.8 14.5 14 15 The nearest whole number is c) 6.5 The nearest whole number is Explain to a partner how to round decimal numbers to the nearest whole number. 2 Use the number line to round these decimal numbers to the nearest tenth and the nearest whole number. a) 7.23 7.25 7.2 7.3 The nearest tenth is The nearest whole number is b) 14.56 14.55 14.5 14.6 The nearest tenth is The nearest whole number is c) 6.45 The nearest tenth is The nearest whole number is Explain to a partner how to round decimal numbers to one decimal place. © White Rose Maths 2019

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Page 1: Rounding decimals Use the number line to round these ...€¦ · 14.5 14 15 The nearest whole number is c) 6.5 The nearest whole number is Explain to a partner how to round decimal

Rounding decimals

1 Showthepositionofeachnumberonthenumberline.

Usethenumberlinetoroundthesedecimalstothenearest

wholenumber.

a) 7.2

7.5

7 8

Thenearestwholenumberis

b) 14.8

14.5

14 15

Thenearestwholenumberis

c) 6.5

Thenearestwholenumberis

Explaintoapartnerhowtorounddecimalnumberstothenearest

wholenumber.

2 Usethenumberlinetoroundthesedecimalnumberstothe

nearesttenthandthenearestwholenumber.

a) 7.23

7.25

7.2 7.3

Thenearesttenthis

Thenearestwholenumberis

b) 14.56

14.55

14.5 14.6

Thenearesttenthis

Thenearestwholenumberis

c) 6.45

Thenearesttenthis

Thenearestwholenumberis

Explaintoapartnerhowtorounddecimalnumberstoone

decimalplace.

©WhiteRoseMaths2019

Page 2: Rounding decimals Use the number line to round these ...€¦ · 14.5 14 15 The nearest whole number is c) 6.5 The nearest whole number is Explain to a partner how to round decimal

©WhiteRoseMaths2019

3 a) Whenroundingtothenearesttenth,how

manydigitswilltherebeafterthedecimalpoint?

b) Roundeachnumbertoonedecimalplace.

1.33 4.03

1.34 4.04

1.35 4.05

1.36 4.06

1.37 4.07

4 Roundeachnumbertothenearesttenth.

a) 4.21 d)11.86 g) 12.92

b)8.09 e) 5.67 h) 10.65

c) 4.84 f) 0.15

5 Circleeachdecimalthatroundsto6.2

6.32 6.23 6.27 6.17 6.12 6.25

Explainyourreasoning.

6 Herearetheweightsinkilogramsofsomeparcels.

3.48kg 1.42kg 10.65kg 1.03kg

a)Roundtheweightofeachparcelto1decimalplace.

kg

kg

kg

kg

b)The weight of each parcel has been rounded to the nearest 100g.

Isthistrueorfalse?

Talkaboutitwithapartner.

7 Amiristhinkingofanumber.

Roundedtothenearestwholehisnumberis5

Roundedtothenearesttenthhisnumberis4.8

WriteatleastfourdifferentnumbersthatAmircouldbethinkingof.

8 Afarmerisbuildinganewfenceforhersheepfield.

Herearethemeasurements.

Shewantstobuildafencearoundthewholefield.

Estimatehowmuchfencingyouthinkshewillneed.

Talkaboutyourestimatewithapartner.

89.56m

125.45m

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