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Bài 9: Introducing eighty to eighty nine
(Giới thiệu từ số 80 đến 89)
Các em làm quen với một số thuật ngữ cơ bản của số học trong bài học Introducing eighty eighty nine của môn Toán bằng Tiếng anh nhé
Bài 9: Introducing eighty to eighty nine
Hey Starry, that’s very interesting book, ROUND THE WORLD IN 80 DAYS.Hey Starry, that’s very interesting book, ROUND THE WORLD IN 80 DAYS.
Are you reading it? Oh, you did not know what the number in the title was.Are you reading it? Oh, you did not know what the number in the title was.
It’s 8 and 0 Starry, 80, e-i-g-h-t-y, 80.It’s 8 and 0 Starry, 80, e-i-g-h-t-y, 80.
The number 80 comes after 79.The number 80 comes after 79.
Remember these strings of beads Starry?Remember these strings of beads Starry?
Each string has 10 beads.Each string has 10 beads.
So ten+ten+ten+ten+ten+ten+ten+ten that’s 8 tens, 80 beads.So ten+ten+ten+ten+ten+ten+ten+ten that’s 8 tens, 80 beads.
Now suppose we add a single bead to these 8 sets of beads we get 8tens 1 which is 81, e-i-g-h-t-y o-n-e.Now suppose we add a single bead to these 8 sets of beads we get 8tens 1 which is 81, e-i-g-h-t-y o-n-e.
On adding 2 beads we get 8 tens 2 that 82, e-i-g-h-t-y t-w-o, 82.On adding 2 beads we get 8 tens 2 that 82, e-i-g-h-t-y t-w-o, 82.
When 3 beads are added to these 8 sets of beads it forms 8 tens 3 which is the number 83, e-i-g-h-t-y t-h-r-e-e, 83.When 3 beads are added to these 8 sets of beads it forms 8 tens 3 which is the number 83, e-i-g-h-t-y t-h-r-e-e, 83.
Now 8 tens plus 1-2-3-4 beads gives us 8 tens 4, which is the number 84, e-i-g-h-t-y f-o-u-r, 84.Now 8 tens plus 1-2-3-4 beads gives us 8 tens 4, which is the number 84, e-i-g-h-t-y f-o-u-r, 84.
And 8 sets of beads plus 5 beads it is 8 tens 5 which forms the number 85, e-i-g-h-t-y f-i-v-e, 85.And 8 sets of beads plus 5 beads it is 8 tens 5 which forms the number 85, e-i-g-h-t-y f-i-v-e, 85.
On adding 1 more beads Starry, we 8 sets of beads plus 1-2-3-4-5-6 beads that 8 tens 6 which is the number 86, e-i-g-h-t-y s-i-x, 86.On adding 1 more beads Starry, we 8 sets of beads plus 1-2-3-4-5-6 beads that 8 tens 6 which is the number 86, e-i-g-h-t-y s-i-x, 86.
Now 8 sets of beads plus 7 beads is 8 tens 7 that is the number 87, e-i-g-h-t-y s-e-v-e-n.Now 8 sets of beads plus 7 beads is 8 tens 7 that is the number 87, e-i-g-h-t-y s-e-v-e-n.
Starry, here are 8 sets of beads plus 1-2-3-4-5-6-7-8 beads, that’s 8 tens 8, 88, e-i-g-h-t-y e-i-g-h-t.Starry, here are 8 sets of beads plus 1-2-3-4-5-6-7-8 beads, that’s 8 tens 8, 88, e-i-g-h-t-y e-i-g-h-t.
And 8 sets of beads and 9 single beads is 8 tens 9, 89, e-i-g-h-t-y n-i-n-e.And 8 sets of beads and 9 single beads is 8 tens 9, 89, e-i-g-h-t-y n-i-n-e.
Counting in the ascending order from 80-81-82-83-84-85-86-87-88-89.Counting in the ascending order from 80-81-82-83-84-85-86-87-88-89.
And in the descending order 89-88-87-86-85-84-83-82-81-80.And in the descending order 89-88-87-86-85-84-83-82-81-80.
Around the world in 80 days Starry!Around the world in 80 days Starry!
Now let’s do an activity together.Now let’s do an activity together.
Identify the numbers on the map and write the correct number name.Identify the numbers on the map and write the correct number name.
8 and 3, 83, e-i-g-h-t-y t-h-r-e-e8 and 3, 83, e-i-g-h-t-y t-h-r-e-e
8 and 0, 80, e-i-g-h-t-y8 and 0, 80, e-i-g-h-t-y
8 and 9, 89, e-i-g-h-t-y n-i-n-e8 and 9, 89, e-i-g-h-t-y n-i-n-e
8 and 4, 84, e-i-g-h-t-y f-o-u-r8 and 4, 84, e-i-g-h-t-y f-o-u-r
8 and 2, 82, e-i-g-h-t-y t-w-o8 and 2, 82, e-i-g-h-t-y t-w-o
8 and 7, 87, e-i-g-h-t-y s-e-v-e-n8 and 7, 87, e-i-g-h-t-y s-e-v-e-n
And now Starry, we have to look at this numbers ladder and fill in the missing numbers.And now Starry, we have to look at this numbers ladder and fill in the missing numbers.
The number that comes above 83 is dash, The number that comes above 83 is 84.The number that comes above 83 is dash, The number that comes above 83 is 84.
The number below 88 is dash. The number below 88 is 87.The number below 88 is dash. The number below 88 is 87.
The number between 87 and 89 is dash. The number between 87 and 89 is 88.The number between 87 and 89 is dash. The number between 87 and 89 is 88.
The number that comes above 85 is dash. The number that comes above 85 is 86.The number that comes above 85 is dash. The number that comes above 85 is 86.
The number below 81 is dash. The number’s below 81 is 80.The number below 81 is dash. The number’s below 81 is 80.
The number between 82 and 84 is dash. The number between 82 and 84 is 83.The number between 82 and 84 is dash. The number between 82 and 84 is 83.
The number that comes above 87 is dash. The number that comes above 87 is 88.The number that comes above 87 is dash. The number that comes above 87 is 88.
Starry, don’t forget the number that comes after 79 is 80, e-i-g-h-t-y, 80.Starry, don’t forget the number that comes after 79 is 80, e-i-g-h-t-y, 80.
