Mixed operations
Money addition and subtraction
Practice exact two-decimal arithmetic with dollar, pound, euro or yen symbols, including a genuine 25-problem option.
Preview and downloadMixed operations practice
Irregular unit addition and subtraction
Mix fifteen compound-measurement calculations using feet and inches, pounds and ounces, hours and minutes, or minutes and seconds.
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Align matching units. Carry or borrow using 12, 16 or 60 as required, then leave the smaller unit normalized.
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Choose the operations and the amount of support
Choose by the learner’s current skills. Mixing operations adds the task of recognizing a sign before choosing a method, even when the individual numbers are familiar.
The preview shows the first student page. Downloads contain the complete worksheet; the version with answers adds a separate key with matching problem positions. More spacious written-method practice may use several pages.
Learning objective
What this activity builds
Regroup using the conversion between the two units rather than a base of ten.
Worked example
2 h 45 min + 1 h 30 min = ?
4 h 15 min
The 75 minutes contain one extra hour and 15 minutes. Add that hour to the three hours already present.
Teaching notes
Make the practice count
- Review each selected conversion before mixing unit pairs on one sheet.
- Feet/inches use 12, pounds/ounces use 16, and both time pairs use 60.
- A correct final smaller-unit value must be less than the conversion base.
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A useful next step
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Practice six problems per operation in one document, with independent digit widths, regrouping settings and long-division remainder options.
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