Online Test — Subtraction Strategies
10 Questions • 15 min • Chapter MCQ
15:00
Question 1 of 10
medium
41 - 28 counting up from 28?
11
13
15
17
Explanation: 28+2=30 then +11=41. Total:13
Question 2 of 10
hard
50 - 19 using compensation (50-20 then +1)?
30
31
32
33
Explanation: 50-20=30 then +1=31
Question 3 of 10
easy
43 - 10 on number line?
23
33
43
53
Explanation: Jump back 10 from 43 = 33
Question 4 of 10
hard
75-5-20=50 uses which strategy?
Decompose subtrahend
Count up
Doubles
Make 10
Explanation: Decomposing 25 into 5+20
Question 5 of 10
easy
66 - 30 = ?
26
36
46
56
Explanation: 66-30 = 36
Question 6 of 10
medium
54 - 9 = ?
44
45
46
47
Explanation: 54-10+1 = 45
Question 7 of 10
medium
Subtraction fact related to 6+8=14?
14-4=10
14-6=8
14-7=7
14-8=6
Explanation: 14-6=8
Question 8 of 10
medium
80 - 45 = ?
25
35
45
55
Explanation: 80-45 = 35
Question 9 of 10
easy
56 - 20 = ?
26
36
46
56
Explanation: 56-20 = 36
Question 10 of 10
medium
Count up from 67 to 100. How much added?
23
33
43
53
Explanation: 67+3=70 then +30=100. Total:33