Using rounding and compatible numbers to extimate products
Authored by Bridget Schulke
Mathematics
4th Grade
CCSS covered
Used 55+ times
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13 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
24×18 rounds to
30x20=600
20x20=400
20x10=200
30x10=300
Tags
CCSS.4.NBT.B.5
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
33×31 is close to
40x30=1,200
40x40=1,600
30x40=1,200
30x30=900
Tags
CCSS.4.NBT.B.5
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Round to estimate the product
38×22
800
1,200
600
900
Tags
CCSS.4.NBT.B.5
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Round to estimate the product.
45×48
2,000
2,500
1,600
2,160
Tags
CCSS.4.NBT.B.5
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
39×19 rounds to
30x20=600
30x10=300
40x20=800
40x10=400
Tags
CCSS.4.NBT.B.5
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
72×48 rounds to
80x50=4,000
80x40=3,200
70x40=2,800
70x50=3,500
Tags
CCSS.4.NBT.B.5
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
Lenore rounds each factor to the nearest ten
to estimate that the product of 52×38
is 1,500. Is her estimate reasonable?
yes
no
Tags
CCSS.4.NBT.B.5
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