Workbook Detail
Mixed Operations Equations Missing Variable — Set 7
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"title": "form-exercise set 7",
"operation": "missing-operator",
"subject": "arithmetic",
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"lhs": 8,
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"question": "8 ___ 13 = 21",
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"question": "1 ___ 6 = 7",
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"altText": "1 and 6 pineapples",
"placement": "before-question"
},
"_visualToken": {
"type": "asset-ref",
"effectiveProvider": "twemoji",
"requestedProvider": "twemoji",
"iconSize": 36,
"layout": "picture-equation",
"placement": "before-question",
"items": [
{
"ref": "twemoji:1f34d",
"name": "pineapple",
"count": 1,
"role": "groupA"
},
{
"ref": "twemoji:1f34d",
"name": "pineapple",
"count": 6,
"role": "groupB"
}
]
}
},
{
"id": 3,
"type": "missing-operator",
"lhs": 18,
"rhs": 6,
"result": 24,
"operator": "+",
"operators": [
"+",
"-",
"×",
"÷"
],
"question": "18 ___ 6 = 24",
"answer": "+",
"correctAnswer": "+"
},
{
"id": 4,
"type": "missing-operator",
"lhs": 8,
"rhs": 6,
"result": 2,
"operator": "-",
"operators": [
"+",
"-",
"×",
"÷"
],
"question": "8 ___ 6 = 2",
"answer": "-",
"correctAnswer": "-",
"visual": {
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"+",
"-",
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"+",
"-",
"×",
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"×",
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"type": "missing-operator",
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"+",
"-",
"×",
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"lhs": 3,
"rhs": 7,
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"-",
"×",
"÷"
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20c-.296.592 1.167-3.833-3-6-1.984-1.032-10 1-4 1 3 0 4 2 2 4-.291.292-.489.603-.622.912-.417.346-.873.709-1.378 1.088-2.263 1.697-5.84 4.227-10 7-3 2-4 3-4 4 0 3 9 3 14 1s10-7 10-7l4-4c-3-4-7-2-7-2z\"/><path fill=\"#FFE8B6\" d=\"M22 20s1.792-4.729-3-7c-4.042-1.916-8-1-11 1s-2 4-3 5 1 2 3 0 8.316-4.895 11-4c3 1 2 2.999 3 5z\"/><path fill=\"#A6D388\" d=\"M26 35h-4c-2 0-3 1-4 1s-2-2 0-2 4 0 5-1 5 2 3 2z\"/><circle fill=\"#3E721D\" cx=\"18\" cy=\"35\" r=\"1\"/><path fill=\"#FFCC4D\" d=\"M32.208 28S28 35 26 35h-4c-2 0 0-1 1-2s5 0 5-6c0-3 4.208 1 4.208 1z\"/><path fill=\"#FFE8B6\" d=\"M26 19c3 0 8 3 7 9s-5 7-7 7h-2c-2 0-1-1 0-2s4 0 4-6c0-3-4-7-6-7 0 0 2-1 4-1z\"/><path fill=\"#FFD983\" d=\"M17 21c3 0 5 1 3 3-1.581 1.581-6 5-10 6s-8 1-5-1 9.764-8 12-8z\"/><path fill=\"#C1694F\" d=\"M2 31c1 0 1 0 1 .667C3 32.333 3 33 2 33s-1-1.333-1-1.333S1 31 2 31z\"/></g></g><text x=\"10\" y=\"58\" font-size=\"12\" font-family=\"sans-serif\" fill=\"#000000\">Total = ____</text></svg>",
"altText": "3 and 7 bananas",
"placement": "before-question"
},
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"items": [
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"ref": "twemoji:1f34c",
"name": "banana",
"count": 3,
"role": "groupA"
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"ref": "twemoji:1f34c",
"name": "banana",
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}Teaching Notes
- 8 ___ 13 = 21
- 1 ___ 6 = 7
- 18 ___ 6 = 24
- 8 ___ 6 = 2
- 9 ___ 4 = 5
- 13 ___ 9 = 4
- 15 ___ 15 = 30
- 17 ___ 4 = 13
- 3 ___ 10 = 30
- 24 ___ 8 = 3
- 9 ___ 6 = 3
- 7 ___ 5 = 35
- 10 ___ 5 = 2
- 8 ___ 6 = 48
- 8 ___ 4 = 2
- 6 ___ 9 = 54
- 10 ___ 2 = 20
- 8 ___ 7 = 56
- 16 ___ 10 = 26
- 3 ___ 7 = 10
Browse free mixed operations worksheets. Each set includes an answer key and covers key skills aligned with Common Core standards.
Features
- Printable PDF format
- Answer key included
- Multiple difficulty levels
- Classroom and home friendly
How to Use These Worksheets
- Select a mixed operations set.
- Print or use on-screen.
- Check answers and practice again.
Tips
- Start with easier sets and move up gradually.
- Practice in short sessions (10–15 minutes).
- Review mistakes and redo similar problems.
Frequently Asked Questions
What math skills are covered in these Mixed Operations Worksheets?
These worksheets cover mixed operations worksheets skills aligned with Common Core standards for K-3 students. Each set builds procedural fluency and conceptual understanding through varied problem formats.
Are these worksheets free to print?
Yes — all worksheets are completely free with no signup required. Click Print for a clean printout optimized for US Letter paper. PDF download is also available.
What grade level are these mixed operations worksheets for?
These worksheets are designed for Kindergarten through Grade 3 students. Topics match Common Core expectations for each grade level.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen to check student work quickly.
Can I use these for homeschool?
Absolutely. These worksheets are widely used by homeschool families for structured math practice. The set-number system lets you assign specific worksheets and track progress.