Read carefully — add or subtract?
8 + 6 =
15 − 7 =
9 + 5 =
14 − 8 =
7 + 7 =
16 − 9 =
Write + or − to make each sentence true.
8 7 = 15
16 9 = 7
9 5 = 14
14 6 = 8
6 6 = 12
18 7 = 11
Read carefully. Think about what operation makes sense.
Sarah has 9 pencils. Her friend gives her 6 more. How many does she have now?
=
There were 17 cookies on the plate. Tom ate 8. How many are left?
=
Two-step problems.
Start at 20. −7, then +5. 20−7=, +5 =
Start at 5. +8, then −3. 5+8=, −3 =
Start at 15. −6, then +4. 15−6=, +4 =
Mystery Operations
9 6 = 15
16 7 = 9
8 5 = 13
20 8 = 12