Area Models
Draw an area model for 21 × 13 on the board.
20×10=200, 20×3=60, 1×10=10, 1×3=3. Total: 273.
60 × 30 = ?
1,800
Estimate 52 × 37 by rounding both numbers to the nearest ten.
50 × 40 = 2,000
5 × a = 30
a = 6
Where was Sarah buried?
Me'aras HaMachpelah, in Chevron
Draw an area model for 32 × 14 on the board.
30×10=300, 30×4=120, 2×10=20, 2×4=8. Total: 448.
For 63 × 42, what is the partial product 3 × 40?
120
Estimate 63 × 42 by rounding both numbers to the nearest ten.
60 × 40 = 2,400
2 × a + 4 = 18
a = 7
What sign did Eliezer ask for at the well to know the right wife for Yitzchak?
She would offer him water AND water his camels
In the area model for 45 × 27, one part is 40 × 7. What is the area of that part?
280
Solve 86 × 37 using partial products.
3,182
Levi wrote: 52 × 37 = 50 × 37 + 2 × 37 = 185 + 74 = 259. What was his mistake?
50 × 37 is 1,850, not 185. He dropped a zero.
30 - 3 × b = 15
b = 5
How much silver did Avraham pay Ephron for Me'aras HaMachpelah?
400 shekels
In the area model for 128 × 45, split 128 into 100 + 20 + 8 and 45 into 40 + 5. How many parts is the rectangle split into?
6
Solve 45 × 27 using partial products.
1,215
Yankel did 41 × 63 as 40 × 60 = 2,400 plus 1 × 3 = 3, and got 2,403. Which two parts did he forget?
40 × 3 = 120 and 1 × 60 = 60
4 × a + 2 = 18
a = 4
When Yitzchak went out to meditate in the field toward evening, which tefillah did he establish?
Mincha
The four parts of the 38 × 57 area model are 1,500, 210, 400 and 56. What is the total area?
2,166
Solve 24 × 71 using partial products.
1,704
Solve 143 × 715 using partial products.
102,245
3 × (a + 5) = 24
a = 3
Rashi says three miracles in Sarah's tent returned when Yitzchak married Rivkah. Name TWO.
A candle lit from Shabbos to Shabbos, a blessing in the dough, a cloud over the tent. Any two.