Determining Reasonable Answer Worksheet With Answer Key Page 6

ADVERTISEMENT

Answer Key
Name:
Determining Reasonable Answer
Determine if the answer shown is reasonable (yes) or not (no).
A n s w e r s
yes
Anything times 2 HAS to end in an even number (2,4,6,8,0).
Ex. 2 × 6 = 12
2 × 13 = 26
1.
no
Anything times 5 HAS to end in an either a 5 or a 0.
Ex. 5 × 4 = 20
5 × 15 = 75
2.
yes
3.
Anything times 10 HAS to end in a 0.
Ex. 10 × 7 = 70
10 × 16 = 160
no
4.
1) 428 × 2 = 856
2) 415 × 5 = 2,077
yes
5.
yes
6.
3) 2 × 744 = 1,488
4) 10 × 724 = 7,242
no
7.
5) 10 × 931 = 9,310
6) 945 × 5 = 4,725
no
8.
no
7) 2 × 522 = 1,045
8) 5 × 669 = 3,346
9.
yes
10.
9) 10 × 243 = 2,431
10) 10 × 591 = 5,910
no
11.
11) 2 × 624 = 1,249
12) 2 × 788 = 1,577
no
12.
no
13.
13) 5 × 124 = 622
14) 10 × 519 = 5,197
no
14.
15) 579 × 5 = 2,898
16) 792 × 5 = 3,960
no
15.
yes
16.
17) 850 × 5 = 4,250
18) 10 × 312 = 3,122
yes
17.
19) 512 × 10 = 5,120
20) 10 × 475 = 4,750
no
18.
yes
19.
yes
20.
1-10 95 90 85 80 75 70 65 60 55 50
3
Math
11-20 45 40 35 30 25 20 15 10 5
0

ADVERTISEMENT

00 votes

Related Articles

Related forms

Related Categories

Parent category: Education