Calculating

Connecting + and −

Name: ______________________________Date: ______________Score: ______ / 20

1.
4 + 6 = 10. What is the inverse (opposite) calculation?
1. A10 - 6 = 4
2. B10 + 6 = 16
3. C6 - 4 = 2
2.
Which is the inverse of 21 + 26 = 47?
1. A47 - 26 = 21
2. B47 + 21 = 68
3. C26 - 21 = 5
3.
39 - 16 = 23. Use the inverse to check: 23 + 16 = ?
4.
Fact family for 3, 5 and 8: 8 - 3 = ?
5.
The numbers 3, 6 and 9 make a fact family. Which subtraction belongs to it?
1. A9 - 6 = 3
2. B9 - 4 = 5
3. C6 - 3 = 3
6.
Fact family for 8, 9 and 17: 17 - 9 = ?
7.
Which fact does NOT belong to the fact family 24, 35 and 59?
1. A24 + 35 = 59
2. B59 - 24 = 35
3. C59 - 30 = 29
8.
A number bond for 10: 7 + ? = 10.
9.
9 + 1 = 10 is a number bond for 10.
True False
10.
40 + 30 = 70. Using the same three numbers: 70 - 30 = ?
11.
Work out 42 + 37 = ?
12.
Work out 77 - 34 = ?
13.
Work out each answer, then order them from the smallest to the largest.
Write the order (smallest answer first) in the boxes:
- ?4 + 6
- ?12 + 7
- ?8 - 3
14.
Put these numbers in order, from smallest to largest.
Write the order (smallest to largest) in the boxes:
- ?14
- ?25
- ?85
- ?94
15.
51 is greater than 20.
True False
16.
50 is less than 96.
True False
17.
48 is greater than 49.
True False
18.
Which symbol makes this true? 51 __ 52
1. A<
2. B>
3. C=
19.
48 is greater than 81.
True False
20.
75 is less than 49.
True False

Answer key

Calculating — Connecting + and −