Multiplicative Comparisons
Write the multplication equation for:
32 is 4 times as many as 8.
32 = 4 x 8
6 x C = 36
C = _____
C = 6
215 x 4 ≈ _____
What number can we round 215 to so we can make a reasonable estimate?
200
2,322 ÷ 6 ≈ _____
Find the closest compatible number for 6 that we can change 2,322 to in order to find a reasonable estimate.
2,400
300
9 times as many as 6 is _____.
54
63 = D x 7
____ = D
9 = D
2,639 x 2 ≈ _____
What are the bounds that we can round 2,439 in order to make a reasonable estimate?
2,439 is between _______ and _______.
2,400 and 2,700
OR
2,000 and 3,000
554 ÷ 9 ≈ _____
Find 2 compatible numbers for 9 that 554 is between.
540 and 630
276 ÷ 3 = _____
92
Luna and Elsie collect Pokemon cards. Luna has 7 times as many Pokemon cards as Elsie. Elsie has 11 Pokemon cards. How many Pokemon cards does Luna have?
77 Pokemon Cards
Makanui read 5 times as many books as Bryce did last year. If Makanui read 60 books last year, how many books did Bryce read?
12 Books
Use rounding to estimate the product:
6 x 389 ≈ _____
6 x 400 = 2,400
Use compatible numbers to estimate the quotient:
1,473 ÷ 4 ≈ _____
1,200 ÷ 4 = 300
OR
1,600 ÷ 4 = 400
J.J. and Evelyn both have 20 packets of fruit snacks. Each packet contains 8 fruit snacks. How many fruit snacks do they have total?
2 x 20 x 8 = ____
320 Fruit Snacks
Is this problem use a multiplicative comparison or an additive comparison? Also, find the answer.
Micah pops 5 balloons. Theodore pops 7 more balloons than Micah. How many balloons does Theodore pop?
Additive Comparison
Theodore pops 12 balloons.
Write a multiplication and division equation to represent this problem. Then solve:
The ultra-rare glitter dumpling squishy costs $64. That is 8 times as much money as Ellis has. How much money does Ellis have?
S x 8 = 64
64 ÷ 8 = S
S = 8
Claire has 8 bags of candy. Each bag has 229 pieces of candy. George B. claims that there are 1,428 pieces of candy in total. Is this a reasonable estimate?
No
Use compatible numbers to estimate the quotient:
4,736 ÷ 7 ≈ _____
4,900 ÷ 7 = 700
Elliot bakes George M. 3 confetti cake cupcakes. George M. counted a total of 213 sprinkles in the cupcakes. How many sprinkles were in each cupcake?
71 Sprinkles
Max bakes 6 cupcakes for a class party. Alister bakes 4 times as many cookies as Max bakes cupcakes. How many cookies did Alister bake?
24 Cupcakes
Neela plants pumpkins in her garden. 48 of her pumpkin plants survive, which is 6 times as many as do not survive. How many pumpkin plants did not survive?
8 Pumpkin Plants
Yes, because it is in between 3,200 and 3,600.
Benji is selling his art. Each of his masterpieces cost $6. Hunter has $4,398. About how many paintings can he buy from Benji?
Benji thinks Hunter will be able to buy a painting for everyone in the school (843 people). Is this reasonable?
About 700 paintings.
No, it is not reasonable.
315 Notes