# Before and After Big Numbers

### Purpose:

You can help your child to say a number 1, 10, 100, 1000 before and after a given number in the range 0 – 1 000 000.

Calculator

### What to do:

Instruction: Give your child a number to enter on the calculator. For example: 725 346. Check they have entered it correctly. Question: What digit will we need to change to find the number 100 after 735 346?
Answer: The 3 because it is in the hundreds column
Instruction: Add 100 on the calculator. Press + 100 =
Question: What is the number 100 after 725 346?

Question: What digit will we need to change to find the number 10 000 after 725 346?
Answer: The 2 because it is in the ten thousands column
Instruction: Add 10 000 on the calculator. Press + 10 000 =
Question: What is the number 10 000 after 725 346?

Question: What digit will we need to change to find the number 1000 before 725 346?
Answer: The 5 because it is in the thousands column
Instruction: Subtract 1000 on the calculator. Press - 1000 =
Question: What is the number 1000 before 725 346?

Focus on one column each time you do this activity. E.g. Hundreds, ten thousands or tens etc.  Keep each session to about twenty minutes.

### What to expect your child to do:

• To read the numbers correctly.
• To recognise the place value of numbers in the columns, e.g. the 2 is in the ten thousands column.

### He Kupu Māori:

 tātaitai calculator tango (hia) subtract tāpiri (hia) add otinga result/answer uara tū place value pānui (hia) read mati digit piki ake increase heke iho decrease

### He Whakawhitinga Kōrero:

• Tuhia te tau 725 346 (whitu rau rua tekau mā rima mano, toru rau whā tekau mā ono) ki te tātaitai. (Enter the number 725 346 to the calculator.)
• Ina tāpiria te 10 000, ko tēhea te mati ka hurihia? (If you add 10 000, which digit changes?)
• Ka piki ake te 2 ki te 3, nā te mea koirā te mati kei te uara tū o te tekau mano. (The 2 increases to a 3 because that is the digit in the 10 000 place value.)
• Ina tangohia te 100, ko tēhea te mati ka hurihia? (If you subtract 100, which digit changes?)
• Ka heke iho te 3 ki te 2, nā te mea koirā te mati e tohu ana i ngā rau. (The 3 decreases to a 2 because that is the digit showing the hundreds.)
• Tāpirihia te 10 000 i te tātaitai. (Add 10 000 on the calculator.)
• Pānuihia te tau i te tātaitai. (Read the number on the calculator.)