Partial Products
Use partial products to solve
132
x 4
-----------
8 + 120 + 400= 528
Draw an area model
17
x 8
---------
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Which expressions could be used to find
327 x 9
a. 327 + 9
b. 9 x 327
c. 9 x (300 + 20 + 7)
d. (9 x 300) + (9 x 20) + (9 x 7)
e. 9 + (300 + 20 + 7)
b.
c.
d.
e.
I sold 4 boxes with 25 pencils in each box. David sold 3 boxes with 32 pencils in each box. How many did we solve in total?
25 x 4 = 100
32 x 3 = 96
196
Draw a bar diagram for 76 x 4
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Use partial products to solve
2,361
x 4
--------------
4 + 240 + 1200 + 8000 = 9,444
236
x 3
---------------
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Which expression has the same value as
3 x 156
a. (3 x 1) + (3 x 5) + (3 x 6)
b. (3 x 100) + (3 x 50) + (3 x 6)
c. (3 x 1) + (3 x 50) + (3 x 600)
b.
Luis sold 7 boxes of cupcakes with 47 cupcakes in each box. Write and solve an equation.
47 x 7 = 329
Draw bar diagram for 365 x 3
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3746
x 4
-----------------
24 + 160 + 2800 + 12000 = 14,984
Draw an area model
385
x 4
-----------
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Which is equivalent to (700 x 3) + (59 x 3)?
a. 700 x 10
b. 759 x 3
c. 700 x 3 + 59
b.
Round and see if your answer is reasonable
3 x 1,458 = 4,374
3 x _____ = ______
3 x 1,000 = 3,000
Answer is not reasonable
Round 1,149
Round 487
1,000
500