Terrific Tens
20 x 30
600
Estimate and solve.
46 x 78
50 x 80 = 4,000
Draw an area model to solve.
51 x 23 = ?
50 x 20 = 1000
1 x 20 = 20
50 x 3 = 150
1 x 3 = 3
Answer = 1,173
Multiply. (use turtle method)
85 x 16
1,360
George is setting up chairs for a music concert. He has 13 rows and each row has 26 chairs in it. How many chairs is he setting up? Write an equation to solve. (hint: use a variable or unknown to show what you need to find)
13 x 26 = c
13 x 26 = 338 or c= 338 chairs
50 x 70
3500
Estimate, solve, and tell whether it's less or greater than.
42 x 34
40 x 30 = 1,200 LESS
Write an equation that shows the product that the area model represents.
46 x 34
46 x 34 = 1,173
Multiply. (use turtle method)
32 x 19
608
A group of 34 kids and 7 parents order tickets for a concert. The kids tickets cost $14 each, and parents tickets cost $17 each. There is a fee $10 for each group to order.
Part A: Complete the equation so that it shows the total amount, t, that the group paid for the order. (set up the equation and use t as your variable)
(34 x 14) + ( 7 x 17) + 10 = t
46 x 20
920
Find the actual and estimate, then solve. Decide whether it is less or greater.
64 x 72
Actual: 4,608
Estimate: 4,200
LESS
Draw an area model for the following problem: 54 x 93
50 x 90 = 4500
4 x 90 = 360
50 x 3= 150
4 x 3 = 12
Answer= 5,022
Multiply. (use Turtle method)
86 x 47
4,042
Part B: Solve the equation. Show your work and state the answer.
(34 x 14) + ( 7 x 17) + 10 = t
(34 x 14) + ( 7 x 17) + 10 = t
(476) + ( 119) + 10 = t
( 595) + 10 = 605
t = $605
56 x 40
2,240
Find the actual and estimate, then solve. Decide whether it is less or greater.
58 x 67
Actual: 58 x 67 = 3,886
Estimate: 60 x 70= 4,200
GREATER
Use the Distributive Property to solve: 23 x 38
23 x 38 = (30 + 8)
= ( 23 x 30) + ( 23 x 8)
= (960) + ( 184)
= 1,144
Multiply. (turtle method)
97 x 84
8,148
Mary has dance practice on Monday and Wednesday for two hours each day. If the dance session lasts 7 weeks, how many hours will she practice? (Set up an equation then solve.)
(2 x 2) x 7 = h
4 x 7 = h
h= 28 hours
Timmy has to deliver 70 cupcakes to each bakery. There are 40 bakeries he has to deliver to. How many cupcakes will he deliver in total? Write an equation and solve.
70 x 40 = 2800
Michael averages 34 points in each basketball game. About how many points will he score in 57 games? Write an equation and solve.
34 x 57 ------> 30 x 60 = about 180 points in 57 games.
Find the missing blanks in the area model.
? 4
30 1200 120
2 80 ?
?= 40 4
30 1200 120
2 80 ? = 8
Solve.
3 7
x 2 ?
________
? ? 5
+ ? ? ?
_____________
37 x 25 = 185 + 740 = 925
Multiply the following problem and then write down some COMMON errors someone might make when multiplying.
36 x 42
1,512
-starting with the 4 first
- forgetting to regroup
-not laying your egg
-adding instead of multiplying
-multiplying instead of adding
-multiplying wrong
-adding incorrectly
-skipping numbers
- accidentally doing the same number twice