# Tenths and Hundredths in Decimal Numbers

### Purpose:

The purpose of this activity is to help your child to learn the number of tenths and hundredths in decimal numbers.

### Link to the Number Framework:

Place value, Stage 6

### What you need:

• Tape measure
• Pencil and paper

### What to do:

• Help your child to find the heights or lengths of objects around the home using a tape measure.
• Record the objects height or length using metres and centimetres.
• For example:
 Object Height Number of tenths Number of hundredths Bench 1.25m
• Check your child understands 10cm is a tenth of a metre.
• Using the table look at the height of an object and ask your child:
• how many tenths are in the number?
• Your child can check this by using the tape measure to count the number of 10cm in the length by counting in tens 10, 20, 30 etc.
• how many hundredths are in the number?
• Again your child can check by using the tape measure to see how many centimeters are in the length.
• Once they have done a couple of examples using the tape measure encourage them to use the table and to look at the pattern. There are 10 tenths in a whole, and 100 hundredths in a whole.

### What to expect your child to do:

• Your child should be able to say how many tenths and hundredths are in decimal numbers.

### Variation:

• Decimal numbers can also be found by measuring the weight of objects on kitchen scales and recording these as kilograms and grams.

### He Kupu Māori:

 tenths hautekau hundredths haurau metre mita centimetre mitarau (henemita) chart tūtohi 1.25 kotahi ira rua rima

### Kia Mataara:

Be careful with the correct way of saying numbers with two and three decimal places. 0.25 is not said as ‘kore ita rua tekau mā rima (zero point twenty five)’ because saying rua tekau (twenty) is incorrect, misleading and confusing. The correct way of saying it is to say each individual digit: ‘kore ira rua rima (zero point two five).

 Te mea hei ine teitei te maha o ngā hautekau te maha o ngā haurau wāhi mahi 1.25m