9 at first.
GRADE-1 MATH · CARRYING ADD3 min
Do not count fingers; make a ten to add
9 + 4—how to do it fast and right?
Today we learn a trick: make a ten. Round the big number up to 10, then add the rest.
1️⃣ Look at big2️⃣ Split small3️⃣ Make ten
WARM-UP · 9+25 min
9 apples in the box, 4 outside—how many in all?
9 + 4 = ? We do not count on our fingers.
📦 9 个🍎🍎🍎🍎 4 个
Guide: move 1 apple from outside into the box; the box becomes 10.
TEACH · MAKE A TEN6 min
9 + 4: split 4 into 1 and 3; 9+1=10, 10+3=13
Big number 9 needs 1 to make ten, so split 1 from 4.
① 9 needs 1② 4 = 1 + 3③ 9+1=10④ 10+3=13
9 + 4 = ?
TEACH · RHYME6 min
One and nine are best friends; two and eight hold hands
Make-a-ten: which pairs make 10?
1 + 9 = 102 + 8 = 103 + 7 = 104 + 6 = 105 + 5 = 10
Clap and read the make-a-ten rhyme; once memorized, carrying addition is half done.
PRACTICE · 8+56 min
8 needs how many to make ten? 2
8 + 5—split 5 into which two numbers?
8 + 5—split 5 into which two?
REVIEW · CIRCLE TEN6 min
Circle the ones that make ten to see the answer at a glance
7 + 5—how to circle a ten?
7 + 5 = ?
APPLY · WORD PROBLEM5 min
9 cars in the lot, 5 more drive in—how many now?
Use make-a-ten: 9 + 5.
5 more arrive.
Explain your work: 9 needs 1, split 5 into 1 and 4, 10+4=14.
SUMMARY · HOMEWORK3 min
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Today we learned
Make-a-ten: look at the big number, split the small, make ten, then add the rest.
9+something, 8+something.
One-nine, two-eight, three-seven.
Homework: compute 9+6, 8+4, 7+5 with make-a-ten; explain your thinking to parents.