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Maths Unit 1: Place value

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  • Round 31 to the nearest ten
    30
  • Round 0.2 to the nearest whole number
    0
  • What is a decimal number?
    A decimal number is part of a whole number
  • Which numerals match the number as words: fifty thousand, two hundred point two
    52 200.2
    50 200.2
    5 200.2
    500 002
  • 923 ÷ 10 =
    92.3
  • 3.9 ÷ 10 =
    0.39
  • How can we regroup 45?
    45 + 10 = 55
    45 = 15 + 15 +15
    30 + 5
    40 + 5
  • When do we round numbers down to the nearest whole number?
    If the number the tenths column is 4 or below ( 1, 2, 3) we round down
  • 4.3 x 100
    430
  • Round 15.6 to the nearest whole number?
    16
  • What is regrouping?
    Regrouping is when we change the way a number decomposed or broken down
  • Decompose this number: 89 013.12 =
    80 000 + 9 000 + 10 + 3 + 0.1 + 0.2
    80 000 + 9 000 + 10 + 3 + 0.1 + 0.02
    80 00 + 9 00 + 1 + 3 + 0.1 + 0.02
    80 000 + 9 00 + 13 + 0.1 + 0.02
  • 43.2 ÷ 100
    0.432
  • When do we round up to the nearest whole number?
    If the number in the tenths column is 5 or above ( 6, 7, 8, 9) we round up.
  • Round 47 to the nearest ten
    50
  • What does it mean to compose a number?
    When we compose a number, we put it together by adding numbers together
  • Round 3.8 to the nearest whole number?
    4
  • Compose this number: 6 + 200 + 0.09 =
    206.09
  • Round 105.9 to the nearest whole number?
    106
  • 4.3 x 10
    43
  • Round 19 to the nearest ten
    20
  • Round 126.3 to the nearest whole number?
    126
  • What does it mean to decompose a number?
    When we decompose a number, we break it down into separate parts (hundreds, tens, ones)
  • What is the value of the 9 in 102.9?
    9 tenths
    9 tens
    9 hundredths
    9 ones
  • Round 0.7 to the nearest whole number
    1
  • 15.2 x 1000
    15 200
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