The make-a-ten rhyme.
GRADE-1 MATH · UNIT 23 min
Last class we met 1-5
Meet 6, 7, 8, 9, 10!
Today master the bonds of 10—the key to carrying addition later.
678910
TEACH · COUNT5 min
5 plus 1 is 6; count on to 10
How many small cubes are in the picture? Count them.
🔴🔴🔴🔴🔴🔴5 plus 1 = 6
Count together: 5,6,7,8,9,10. Move beads on the counter as you count.
TEACH · COMPARE6 min
Numbers later in the row are bigger
Which is bigger, 8 or 9? Which sign?
6 7 8 9 10
8 ○ 9—what goes in the circle?
TEACH · KEY6 min
1&9, 2&8, 3&7, 4&6, 5&5
10 splits into which pairs? Recite the make-a-ten rhyme.
10 = 1+910 = 2+810 = 3+710 = 4+610 = 5+5
10 splits into 3 and how many?
TEACH · CHAIN6 min
Calculate step by step, left to right
3 birds, 2 more fly in, 4 more fly in—how many now?
3 + 2 = 55 + 4 = 9
Chain addition left to right: first 3+2=5, then 5+4=9.
PRACTICE · MENTAL6 min
Mental math train; who is fastest?
7 - 3 + 2 = ?
7 - 3 + 2 = ?
APPLY · WORD5 min
Xiao Ming has 4 in front, 5 behind—how many in line?
Do not forget Xiao Ming himself!
4 人 + 小明 1 人 + 5 人 = 10 人
Common mistake: only 4+5=9, forgetting Xiao Ming. Draw a picture.
SUMMARY · HOMEWORK3 min
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Today we learned
Count 6-10, bonds of 10, chain add/subtract.
Chain add/subtract.
Homework: recite the make-a-ten rhyme; do 10 mental math problems within 10.