Stage 4
One more than 39
40
One more than 599
600
One more than 703, 999
704,000
Adding one to 999 makes a new thousand.
So 3, 999 becomes 4,000
and 703,999 +1 is 704,000
Which decimal is the biggest?
.7, .62, .540
One less than 90
89
One less than 800
799
One less than 405, 000
5,000 minus one is 4,999.
So 405,000 - 1 is 404,999
Which decimal is the smallest?
3.5, 3.67, 3.09
Write the fraction for one tenth
1/10
Write the fraction for 8 fifths.
8/5
1/3, 1/7, 1/5
If all of the fractions have the same numerator, the denominator tells how big or small they are.
Why is 1/3 bigger than 1/5 ?
Why is 2/8 smaller than 2/12 ?
What fraction is the same as 4/5?
2/10, 2/3, 8/10
Write the fraction for four ninths
4/9
Order these fractions by size, biggest to smallest
3/5, 1/5, 4/5
If the denominator is the same, that means the numerator tells how large or small the fraction is.
1/5 is one slice of a 5 slice pizza.
4/5 is 4 slices of a 5 slice pizza.
Write 3 5/8 as a fraction
29/8.
There are 24 eighths in 3 wholes (3 X 8 = 24). There are 5 left over eights, so 24 + 5 is 29. The answer is 29/8
Which fraction is the smallest?
4/5, 2/10, 6/8
2/10
How many tens are in the number 54
5
How many tens are in all of the number 675
We can ignore the ones place. . So 675 has 67 tens in it!
600 is 60 tens.
70 is 7 tens.
67 tens in all of the number 675
How many hundreds are in all of the number 16,400
There are 164 hundreds in 16,400.
We can ignore the tens and ones since we want to know how many hundreds there are.
10,000 + 6,000 + 400.
There are 100 hundreds in 10,000
There are 60 hundreds in 6,000.
There are 4 hundreds in 400.
So 100 + 60 + 4 is 164!
Round this decimal to the nearest tenth. 3.67
3.7
What is the number for 7 groups of ten?
70
What is the number for 31 groups of ten.
31 groups of ten is the same as 31 X 10. Any number times ten just adds a zero to change the place value.
So 31 x 10 is 310. 31 groups of ten is 310
How many tenths are in 5.2
There are 52 tenths in 5.2. We can move the decimal one place to the left to make the one into tenths.
How many thousands are in all of the number 703,299
There are 703 thousands. We can ignore the ones, tens and hundreds.
9+8
17- use doubles when the addends are one away from each other.
What is 9 + 7?
16.
Make a 10 in your head if you don't know this by heart.
9 kidnaps 1 from 7 to make itself a 10.
So 6 of the seven is left, so 10 + 6 is 16!
17-9
know by heart or use doubles facts
9 + 9 is 18, so 9 + 8 is 17, and 17 - 9 is 8
49 divided by 7
7
4. A fraction of any whole number is a division problem. So 1/4 of 16 is the same as 16 divided by 4.
One half of 18 is the same as 18/2.
One tenth of 70 is the same as 70 divided by 10.
What is 6x5
Use a known fact if you don't know this by heart.
What is 8x6
know by heart or use known facts.
8x5 is 40, so one more group of 8 is 48. 8X6 is 48
What number divided by 7 gives 9.
Division is the opposite of multiplication, so 7 times 9 is 63, and 63 divided by 9 gives 7.